TÌM X LỚP 6

<p> </p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhUe1mgeIJWBfMG40c98abySdG-2WUD3lQ9ztRrlUyn7hOGFadihHVfHVEzPrR5DnSHs-DXgQp2J2W2RtiAh2On2_l4U2V6dzytfZqrqK_YnwVeNIxMD7EJVd3Y_aDMKACdaB779urn_uh9mgVfhRzJEt1k7IhQh3m03XZxadQeNkrVqgbWtw2h6Ho1u1jg/s1287/TIM%20X.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1287" data-original-width="1280" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhUe1mgeIJWBfMG40c98abySdG-2WUD3lQ9ztRrlUyn7hOGFadihHVfHVEzPrR5DnSHs-DXgQp2J2W2RtiAh2On2_l4U2V6dzytfZqrqK_YnwVeNIxMD7EJVd3Y_aDMKACdaB779urn_uh9mgVfhRzJEt1k7IhQh3m03XZxadQeNkrVqgbWtw2h6Ho1u1jg/w199-h200/TIM%20X.jpg" width="199" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><br /></div><br /><p></p><div class="toc" style="background-color: white; border-radius: 3px; border: 1px solid rgb(238, 238, 238); clear: left; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 8px 0px; padding: 8px;"><ul style="border-bottom-color: initial; border-bottom-style: initial; border-image: initial; border-left-color: initial; border-left-style: initial; border-right-color: initial; border-right-style: initial; border-top-color: rgb(238, 238, 238); border-top-style: solid; border-width: 1px 0px 0px; font: inherit; list-style-image: initial; list-style-position: initial; margin: 8px 0px 0px; padding: 8px 0px 0px;"><li style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 30px; list-style: none; margin: 0px 0px 0px 8px; padding: 0px; vertical-align: bottom;"><a href="https://giaitoan.com/tim-x-biet-lop-6-240823#mcetoc_1g8asa8em1e1" style="border: 0px; color: #003399; display: block; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;">A. Cách giải các dạng toán tìm x lớp 6</a><ul style="border: 0px; font: inherit; list-style: disc; margin: 0px; padding: 0px;"><li style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 30px; list-style: none; margin: 0px 0px 0px 14px; padding: 0px; vertical-align: bottom;"><a href="https://giaitoan.com/tim-x-biet-lop-6-240823#mcetoc_1g8asa8em1e2" style="border: 0px; color: #003399; display: block; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;">1. Tìm số hạng chưa biết trong một tổng</a></li><li style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 30px; list-style: none; margin: 0px 0px 0px 14px; padding: 0px; vertical-align: bottom;"><a href="https://giaitoan.com/tim-x-biet-lop-6-240823#mcetoc_1g8asa8em1e3" style="border: 0px; color: #003399; display: block; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;">2. Tìm số bị trừ trong một hiệu</a></li><li style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 30px; list-style: none; margin: 0px 0px 0px 14px; padding: 0px; vertical-align: bottom;"><a href="https://giaitoan.com/tim-x-biet-lop-6-240823#mcetoc_1g8asa8em1e4" style="border: 0px; color: #003399; display: block; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;">3. Tìm số trừ trong một hiệu</a></li><li style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 30px; list-style: none; margin: 0px 0px 0px 14px; padding: 0px; vertical-align: bottom;"><a href="https://giaitoan.com/tim-x-biet-lop-6-240823#mcetoc_1g8asa8em1e5" style="border: 0px; color: #003399; display: block; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;">4. Tìm thừa số chưa biết trong một tích</a></li><li style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 30px; list-style: none; margin: 0px 0px 0px 14px; padding: 0px; vertical-align: bottom;"><a href="https://giaitoan.com/tim-x-biet-lop-6-240823#mcetoc_1g8asa8em1e6" style="border: 0px; color: #003399; display: block; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;">5. Tìm số bị chia trong một thương</a></li><li style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 30px; list-style: none; margin: 0px 0px 0px 14px; padding: 0px; vertical-align: bottom;"><a href="https://giaitoan.com/tim-x-biet-lop-6-240823#mcetoc_1g8asa8em1e7" style="border: 0px; color: #003399; display: block; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;">6. Tìm số chia trong một thương</a></li></ul></li><li style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 30px; list-style: none; margin: 0px 0px 0px 8px; padding: 0px; vertical-align: bottom;"><a href="https://giaitoan.com/tim-x-biet-lop-6-240823#mcetoc_1fn14c1c74" style="border: 0px; color: #003399; display: block; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;">B. Tìm x biết</a></li><li style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 30px; list-style: none; margin: 0px 0px 0px 8px; padding: 0px; vertical-align: bottom;"><a href="https://giaitoan.com/tim-x-biet-lop-6-240823#mcetoc_1fn14c1c75" style="border: 0px; color: #003399; display: block; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;">C. Tìm số nguyên x biết, Tìm số tự nhiên x biết</a></li></ul></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;"><a href="https://giaitoan.com/" style="border: 0px; color: #003399; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;">GiaiToan.com</a> </strong>biên soạn và đăng tải tài liệu <a href="https://giaitoan.com/tim-x-biet-lop-6-240823" style="border: 0px; color: #003399; font: inherit; margin: 0px; padding: 0px; text-decoration-line: none;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Bài tập Tìm x biết lớp 6 </strong></a>được biên soạn theo chương trình sách mới (sách Kết nối tri thức, sách Cánh Diều và sách Chân trời sáng tạo) giúp học sinh hiểu rõ về công thức tìm x, tìm số nguyên x biết, tìm số tự nhiên x biết,  cách tìm x dễ dàng và dễ hiểu, kèm theo đó là bài tập rèn luyện có hướng dẫn chi tiết mời các em học sinh cùng tham khảo. Chúc các bạn học tập tốt!</p><h2 id="mcetoc_1g8asa8em1e1" style="background-color: white; border: 0px; color: #45710a; font-family: arial; font-size: 22px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 32px; margin: 10px 0px; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">A. Cách giải các dạng toán tìm x lớp 6</strong></h2><h3 id="mcetoc_1g8asa8em1e2" style="background-color: white; border: 0px; color: #444444; font-family: arial; font-size: 18px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 10px 0px 0px; padding: 8px 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">1. Tìm số hạng chưa biết trong một tổng</strong></h3><div class="tips" style="background: rgb(246, 246, 246); border-color: rgb(2, 174, 239); border-image: initial; border-style: solid; border-width: 1px 1px 1px 8px; color: #0072bc; font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 8px; padding: 8px 12px 2px; quotes: none;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Muốn tìm số hạng chưa biết trong một tổng, ta lấy tổng từ đi số hạng đã biết</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;">a + x = b hoặc x + a = b => x = b - a</p></div><div class="adbox in-article" style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 16px; padding: 0px; text-align: center;"></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Ví dụ: </strong>Tìm biết:</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) x + 4 = 9 (x là số hạng chưa biết, 4 là số hạng đã biết, 9 là tổng)</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 9 - 4</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 4</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 4</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) 25 + x = 30 (x là số hạng chưa biết, 25 là số hạng đã biết, 30 là tổng)</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 30 - 25</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 5</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 5</p><h3 id="mcetoc_1g8asa8em1e3" style="background-color: white; border: 0px; color: #444444; font-family: arial; font-size: 18px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 10px 0px 0px; padding: 8px 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">2. Tìm số bị trừ trong một hiệu</strong></h3><div class="tips" style="background: rgb(246, 246, 246); border-color: rgb(2, 174, 239); border-image: initial; border-style: solid; border-width: 1px 1px 1px 8px; color: #0072bc; font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 8px; padding: 8px 12px 2px; quotes: none;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Muốn tìm số bị trừ ta lấy hiệu cộng với số trừ</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;">x - a = b => x = b + a</p></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Ví dụ:</strong> Tìm x biết:</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x - 4 = 7 (x là số hạng chưa biết, 4 là số trừ, 7 là hiệu)</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 7 + 4</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 11</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 11</p><h3 id="mcetoc_1g8asa8em1e4" style="background-color: white; border: 0px; color: #444444; font-family: arial; font-size: 18px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 10px 0px 0px; padding: 8px 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">3. Tìm số trừ trong một hiệu</strong></h3><div class="tips" style="background: rgb(246, 246, 246); border-color: rgb(2, 174, 239); border-image: initial; border-style: solid; border-width: 1px 1px 1px 8px; color: #0072bc; font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 8px; padding: 8px 12px 2px; quotes: none;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Muốn tìm số trừ ta lấy số bị trừ trừ đi hiệu</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;">a - x = b => x = a - b</p></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Ví dụ: </strong>Tìm x:</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">11 - x = 5 (x là số hạng chưa biết, 11 là số bị trừ, 5 là hiệu)</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 11 - 5</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 6</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 6</p><h3 id="mcetoc_1g8asa8em1e5" style="background-color: white; border: 0px; color: #444444; font-family: arial; font-size: 18px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 10px 0px 0px; padding: 8px 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">4. Tìm thừa số chưa biết trong một tích</strong></h3><div class="tips" style="background: rgb(246, 246, 246); border-color: rgb(2, 174, 239); border-image: initial; border-style: solid; border-width: 1px 1px 1px 8px; color: #0072bc; font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 8px; padding: 8px 12px 2px; quotes: none;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Muốn tìm thừa số chưa biết trong một tích ta lấy tích chia cho thừa số đã biết</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;">a . x = b => x = b : a</p></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Ví dụ:</strong> Tìm x biết:</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">2 . x = 32 (x là thừa số chưa biết, 2 là thừa số đã biết, 32 là tích)</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 32 : 2</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 16</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 16</p><h3 id="mcetoc_1g8asa8em1e6" style="background-color: white; border: 0px; color: #444444; font-family: arial; font-size: 18px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 10px 0px 0px; padding: 8px 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">5. Tìm số bị chia trong một thương</strong></h3><div class="tips" style="background: rgb(246, 246, 246); border-color: rgb(2, 174, 239); border-image: initial; border-style: solid; border-width: 1px 1px 1px 8px; color: #0072bc; font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 8px; padding: 8px 12px 2px; quotes: none;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Muốn tìm số bị chia ta lấy thương nhân với số chia</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;">x : a = b => x = b . a</p></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Ví dụ: </strong>Tìm x biết:</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x : 5 = 10 (x là số bị chia chưa biết, 5 là số chia, 10 là thương)</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 10 . 5</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 50</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 50</p><h3 id="mcetoc_1g8asa8em1e7" style="background-color: white; border: 0px; color: #444444; font-family: arial; font-size: 18px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 10px 0px 0px; padding: 8px 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">6. Tìm số chia trong một thương</strong></h3><div class="adbox in-article" style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 16px; padding: 0px; text-align: center;"></div><div class="tips" style="background: rgb(246, 246, 246); border-color: rgb(2, 174, 239); border-image: initial; border-style: solid; border-width: 1px 1px 1px 8px; color: #0072bc; font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 8px; padding: 8px 12px 2px; quotes: none;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Muốn tìm số chia ta lấy số bị chia chia cho thương</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;">a : x = b => x = a : b</p></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Ví dụ: </strong>Tìm x biết:</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">270 : x = 90 (270 là số bị chia, x là số chia chưa biết, 90 là thương)</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 270 : 90</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 3</p><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">vậy x = 3</p><h2 id="mcetoc_1fn14c1c74" style="background-color: white; border: 0px; color: #45710a; font-family: arial; font-size: 22px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 32px; margin: 10px 0px; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">B. Tìm x biết</strong></h2><div class="tips" style="background: rgb(246, 246, 246); border-color: rgb(2, 174, 239); border-image: initial; border-style: solid; border-width: 1px 1px 1px 8px; color: #0072bc; font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 8px; padding: 8px 12px 2px; quotes: none;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Ví dụ 1:</strong> Tìm số tự nhiên x biết:</p><table border="0" style="border-collapse: collapse; border-spacing: 0px; border: 0px; font: inherit; margin: 0px 0px 16px; max-width: 100%; overflow: auto; padding: 0px;"><tbody><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) <img alt="132 - 2\left( {x - 4} \right) = 46" class="lazy loaded" data-latex="132 - 2\left( {x - 4} \right) = 46" data-src="https://tex.vdoc.vn?tex=132%20-%202%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%20%3D%2046" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=132%20-%202%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%20%3D%2046" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 164px;" width="164" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) <img alt="{3^x} = 9" class="lazy loaded" data-latex="{3^x} = 9" data-src="https://tex.vdoc.vn?tex=%7B3%5Ex%7D%20%3D%209" data-type="0" data-was-processed="true" height="17" src="https://tex.vdoc.vn/?tex=%7B3%5Ex%7D%20%3D%209" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 17px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 53px;" width="53" /></p></td></tr><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">c) <img alt="9x - 4x = {6^{17}}:{6^{15}} + 48:12" class="lazy loaded" data-latex="9x - 4x = {6^{17}}:{6^{15}} + 48:12" data-src="https://tex.vdoc.vn?tex=9x%20-%204x%20%3D%20%7B6%5E%7B17%7D%7D%3A%7B6%5E%7B15%7D%7D%20%2B%2048%3A12" data-type="0" data-was-processed="true" height="21" src="https://tex.vdoc.vn/?tex=9x%20-%204x%20%3D%20%7B6%5E%7B17%7D%7D%3A%7B6%5E%7B15%7D%7D%20%2B%2048%3A12" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 21px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 227px;" width="227" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">d) <img alt="{\left( {x + 1} \right)^2} = 25" class="lazy loaded" data-latex="{\left( {x + 1} \right)^2} = 25" data-src="https://tex.vdoc.vn?tex=%7B%5Cleft(%20%7Bx%20%2B%201%7D%20%5Cright)%5E2%7D%20%3D%2025" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%7B%5Cleft(%20%7Bx%20%2B%201%7D%20%5Cright)%5E2%7D%20%3D%2025" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 109px;" width="109" /></p></td></tr></tbody></table></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Hướng dẫn giải</strong></p><div class="textview-row" style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px; padding: 0px;"><div class="col-two" style="border: 0px; font: inherit; margin: 0px; padding: 0px;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) <img alt="132 - 2\left( {x - 4} \right) = 46" class="lazy loaded" data-latex="132 - 2\left( {x - 4} \right) = 46" data-src="https://tex.vdoc.vn?tex=132%20-%202%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%20%3D%2046" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=132%20-%202%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%20%3D%2046" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 164px;" width="164" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> 2\left( {x - 4} \right) = 132 - 46 \hfill \\<br /> 2\left( {x - 4} \right) = 86 \hfill \\<br /> x - 4 = 86:2 \hfill \\<br /> x - 4 = 43 \hfill \\<br /> x = 43 + 4 = 47 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> 2\left( {x - 4} \right) = 132 - 46 \hfill \\<br /> 2\left( {x - 4} \right) = 86 \hfill \\<br /> x - 4 = 86:2 \hfill \\<br /> x - 4 = 43 \hfill \\<br /> x = 43 + 4 = 47 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%202%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%20%3D%20132%20-%2046%20%5Chfill%20%5C%5C%0A%20%202%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%20%3D%2086%20%5Chfill%20%5C%5C%0A%20%20x%20-%204%20%3D%2086%3A2%20%5Chfill%20%5C%5C%0A%20%20x%20-%204%20%3D%2043%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2043%20%2B%204%20%3D%2047%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="127" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%202%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%20%3D%20132%20-%2046%20%5Chfill%20%5C%5C%0A%20%202%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%20%3D%2086%20%5Chfill%20%5C%5C%0A%20%20x%20-%204%20%3D%2086%3A2%20%5Chfill%20%5C%5C%0A%20%20x%20-%204%20%3D%2043%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2043%20%2B%204%20%3D%2047%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 127px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 169px;" width="169" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 47</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">c) <img alt="9x - 4x = {6^{17}}:{6^{15}} + 48:12" class="lazy loaded" data-latex="9x - 4x = {6^{17}}:{6^{15}} + 48:12" data-src="https://tex.vdoc.vn?tex=9x%20-%204x%20%3D%20%7B6%5E%7B17%7D%7D%3A%7B6%5E%7B15%7D%7D%20%2B%2048%3A12" data-type="0" data-was-processed="true" height="21" src="https://tex.vdoc.vn/?tex=9x%20-%204x%20%3D%20%7B6%5E%7B17%7D%7D%3A%7B6%5E%7B15%7D%7D%20%2B%2048%3A12" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 21px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 227px;" width="227" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> \left( {9 - 4} \right)x = {6^2} + 4 \hfill \\<br /> 5x = 40 \hfill \\<br /> x = 40:5 = 8 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> \left( {9 - 4} \right)x = {6^2} + 4 \hfill \\<br /> 5x = 40 \hfill \\<br /> x = 40:5 = 8 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%5Cleft(%20%7B9%20-%204%7D%20%5Cright)x%20%3D%20%7B6%5E2%7D%20%2B%204%20%5Chfill%20%5C%5C%0A%20%205x%20%3D%2040%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2040%3A5%20%3D%208%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="75" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%5Cleft(%20%7B9%20-%204%7D%20%5Cright)x%20%3D%20%7B6%5E2%7D%20%2B%204%20%5Chfill%20%5C%5C%0A%20%205x%20%3D%2040%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2040%3A5%20%3D%208%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 75px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 150px;" width="150" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 8</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"></p></div><div class="col-two" style="border: 0px; font: inherit; margin: 0px; padding: 0px;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) <img alt="{3^x} = 9" class="lazy loaded" data-latex="{3^x} = 9" data-src="https://tex.vdoc.vn?tex=%7B3%5Ex%7D%20%3D%209" data-type="0" data-was-processed="true" height="17" src="https://tex.vdoc.vn/?tex=%7B3%5Ex%7D%20%3D%209" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 17px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 53px;" width="53" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> {3^x} = {3^2} \hfill \\<br /> x = 2 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> {3^x} = {3^2} \hfill \\<br /> x = 2 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%7B3%5Ex%7D%20%3D%20%7B3%5E2%7D%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%202%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="49" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%7B3%5Ex%7D%20%3D%20%7B3%5E2%7D%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%202%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 49px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 67px;" width="67" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 2</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">d) <img alt="{\left( {x + 1} \right)^2} = 25" class="lazy loaded" data-latex="{\left( {x + 1} \right)^2} = 25" data-src="https://tex.vdoc.vn?tex=%7B%5Cleft(%20%7Bx%20%2B%201%7D%20%5Cright)%5E2%7D%20%3D%2025" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%7B%5Cleft(%20%7Bx%20%2B%201%7D%20%5Cright)%5E2%7D%20%3D%2025" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 109px;" width="109" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> {\left( {x + 1} \right)^2} = {5^2} \hfill \\<br /> x + 1 = 5 \hfill \\<br /> x = 5 - 1 \hfill \\<br /> x = 4 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> {\left( {x + 1} \right)^2} = {5^2} \hfill \\<br /> x + 1 = 5 \hfill \\<br /> x = 5 - 1 \hfill \\<br /> x = 4 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%7B%5Cleft(%20%7Bx%20%2B%201%7D%20%5Cright)%5E2%7D%20%3D%20%7B5%5E2%7D%20%5Chfill%20%5C%5C%0A%20%20x%20%2B%201%20%3D%205%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%205%20-%201%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%204%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="103" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%7B%5Cleft(%20%7Bx%20%2B%201%7D%20%5Cright)%5E2%7D%20%3D%20%7B5%5E2%7D%20%5Chfill%20%5C%5C%0A%20%20x%20%2B%201%20%3D%205%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%205%20-%201%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%204%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 103px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 114px;" width="114" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 4</p></div></div><div class="tips" style="background: rgb(246, 246, 246); border-color: rgb(2, 174, 239); border-image: initial; border-style: solid; border-width: 1px 1px 1px 8px; color: #0072bc; font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 8px; padding: 8px 12px 2px; quotes: none;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Ví dụ 2:</strong> Tìm x biết:</p><table border="0" style="border-collapse: collapse; border-spacing: 0px; border: 0px; font: inherit; height: 112px; margin: 0px 0px 16px; max-width: 100%; overflow: auto; padding: 0px; width: 663px;"><tbody><tr style="height: 56px;"><td style="height: 56px; width: 329.5px;" width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) <img alt="156 - \left( {x + 32} \right) = 115" class="lazy loaded" data-latex="156 - \left( {x + 32} \right) = 115" data-src="https://tex.vdoc.vn?tex=156%20-%20%5Cleft(%20%7Bx%20%2B%2032%7D%20%5Cright)%20%3D%20115" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=156%20-%20%5Cleft(%20%7Bx%20%2B%2032%7D%20%5Cright)%20%3D%20115" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 170px;" width="170" /></p></td><td style="height: 56px; width: 329.5px;" width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) <img alt="25 - 3\left( {6 - x} \right) = 22" class="lazy loaded" data-latex="25 - 3\left( {6 - x} \right) = 22" data-src="https://tex.vdoc.vn?tex=25%20-%203%5Cleft(%20%7B6%20-%20x%7D%20%5Cright)%20%3D%2022" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=25%20-%203%5Cleft(%20%7B6%20-%20x%7D%20%5Cright)%20%3D%2022" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 154px;" width="154" /></p></td></tr><tr style="height: 56px;"><td style="height: 56px; width: 329.5px;" width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">c) <img alt="\left( {x:23 + 45} \right).67 = 8911" class="lazy loaded" data-latex="\left( {x:23 + 45} \right).67 = 8911" data-src="https://tex.vdoc.vn?tex=%5Cleft(%20%7Bx%3A23%20%2B%2045%7D%20%5Cright).67%20%3D%208911" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=%5Cleft(%20%7Bx%3A23%20%2B%2045%7D%20%5Cright).67%20%3D%208911" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 189px;" width="189" /></p></td><td style="height: 56px; width: 329.5px;" width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">d) <img alt="{\left( {8 - 2x} \right)^3} = 27" class="lazy loaded" data-latex="{\left( {8 - 2x} \right)^3} = 27" data-src="https://tex.vdoc.vn?tex=%7B%5Cleft(%20%7B8%20-%202x%7D%20%5Cright)%5E3%7D%20%3D%2027" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%7B%5Cleft(%20%7B8%20-%202x%7D%20%5Cright)%5E3%7D%20%3D%2027" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 118px;" width="118" /></p></td></tr></tbody></table></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Hướng dẫn giải</strong></p><div class="textview-row" style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px; padding: 0px;"><div class="col-two" style="border: 0px; font: inherit; margin: 0px; padding: 0px;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) <img alt="156 - \left( {x + 32} \right) = 115" class="lazy loaded" data-latex="156 - \left( {x + 32} \right) = 115" data-src="https://tex.vdoc.vn?tex=156%20-%20%5Cleft(%20%7Bx%20%2B%2032%7D%20%5Cright)%20%3D%20115" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=156%20-%20%5Cleft(%20%7Bx%20%2B%2032%7D%20%5Cright)%20%3D%20115" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 170px;" width="170" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> x + 32 = 156 - 115 \hfill \\<br /> x + 32 = 41 \hfill \\<br /> x = 41 - 32 = 9 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> x + 32 = 156 - 115 \hfill \\<br /> x + 32 = 41 \hfill \\<br /> x = 41 - 32 = 9 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%20x%20%2B%2032%20%3D%20156%20-%20115%20%5Chfill%20%5C%5C%0A%20%20x%20%2B%2032%20%3D%2041%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2041%20-%2032%20%3D%209%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="73" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%20x%20%2B%2032%20%3D%20156%20-%20115%20%5Chfill%20%5C%5C%0A%20%20x%20%2B%2032%20%3D%2041%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2041%20-%2032%20%3D%209%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 73px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 161px;" width="161" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 9</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">c) <img alt="\left( {x:23 + 45} \right).67 = 8911" class="lazy loaded" data-latex="\left( {x:23 + 45} \right).67 = 8911" data-src="https://tex.vdoc.vn?tex=%5Cleft(%20%7Bx%3A23%20%2B%2045%7D%20%5Cright).67%20%3D%208911" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=%5Cleft(%20%7Bx%3A23%20%2B%2045%7D%20%5Cright).67%20%3D%208911" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 189px;" width="189" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> x:23 + 45 = 8911:67 \hfill \\<br /> x:23 + 45 = 133 \hfill \\<br /> x:23 = 133 - 45 \hfill \\<br /> x:23 = 88 \hfill \\<br /> x = 88.23 = 2024 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> x:23 + 45 = 8911:67 \hfill \\<br /> x:23 + 45 = 133 \hfill \\<br /> x:23 = 133 - 45 \hfill \\<br /> x:23 = 88 \hfill \\<br /> x = 88.23 = 2024 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%20x%3A23%20%2B%2045%20%3D%208911%3A67%20%5Chfill%20%5C%5C%0A%20%20x%3A23%20%2B%2045%20%3D%20133%20%5Chfill%20%5C%5C%0A%20%20x%3A23%20%3D%20133%20-%2045%20%5Chfill%20%5C%5C%0A%20%20x%3A23%20%3D%2088%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2088.23%20%3D%202024%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="126" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%20x%3A23%20%2B%2045%20%3D%208911%3A67%20%5Chfill%20%5C%5C%0A%20%20x%3A23%20%2B%2045%20%3D%20133%20%5Chfill%20%5C%5C%0A%20%20x%3A23%20%3D%20133%20-%2045%20%5Chfill%20%5C%5C%0A%20%20x%3A23%20%3D%2088%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2088.23%20%3D%202024%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 126px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 188px;" width="188" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 2024</p></div><div class="col-two" style="border: 0px; font: inherit; margin: 0px; padding: 0px;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) <img alt="25 - 3\left( {6 - x} \right) = 22" class="lazy loaded" data-latex="25 - 3\left( {6 - x} \right) = 22" data-src="https://tex.vdoc.vn?tex=25%20-%203%5Cleft(%20%7B6%20-%20x%7D%20%5Cright)%20%3D%2022" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=25%20-%203%5Cleft(%20%7B6%20-%20x%7D%20%5Cright)%20%3D%2022" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 154px;" width="154" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> 3\left( {6 - x} \right) = 25 - 22 \hfill \\<br /> 3\left( {6 - x} \right) = 3 \hfill \\<br /> 6 - x = 3:3 \hfill \\<br /> 6 - x = 1 \hfill \\<br /> x = 6 - 1 = 5 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> 3\left( {6 - x} \right) = 25 - 22 \hfill \\<br /> 3\left( {6 - x} \right) = 3 \hfill \\<br /> 6 - x = 3:3 \hfill \\<br /> 6 - x = 1 \hfill \\<br /> x = 6 - 1 = 5 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%203%5Cleft(%20%7B6%20-%20x%7D%20%5Cright)%20%3D%2025%20-%2022%20%5Chfill%20%5C%5C%0A%20%203%5Cleft(%20%7B6%20-%20x%7D%20%5Cright)%20%3D%203%20%5Chfill%20%5C%5C%0A%20%206%20-%20x%20%3D%203%3A3%20%5Chfill%20%5C%5C%0A%20%206%20-%20x%20%3D%201%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%206%20-%201%20%3D%205%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="127" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%203%5Cleft(%20%7B6%20-%20x%7D%20%5Cright)%20%3D%2025%20-%2022%20%5Chfill%20%5C%5C%0A%20%203%5Cleft(%20%7B6%20-%20x%7D%20%5Cright)%20%3D%203%20%5Chfill%20%5C%5C%0A%20%206%20-%20x%20%3D%203%3A3%20%5Chfill%20%5C%5C%0A%20%206%20-%20x%20%3D%201%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%206%20-%201%20%3D%205%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 127px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 160px;" width="160" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 5</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">d) <img alt="{\left( {8 - 2x} \right)^3} = 27" class="lazy loaded" data-latex="{\left( {8 - 2x} \right)^3} = 27" data-src="https://tex.vdoc.vn?tex=%7B%5Cleft(%20%7B8%20-%202x%7D%20%5Cright)%5E3%7D%20%3D%2027" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%7B%5Cleft(%20%7B8%20-%202x%7D%20%5Cright)%5E3%7D%20%3D%2027" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 118px;" width="118" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> {\left( {7 - 2x} \right)^3} = {3^3} \hfill \\<br /> 7 - 2x = 3 \hfill \\<br /> 2x = 7 - 3 \hfill \\<br /> 2x = 4 \hfill \\<br /> x = 2 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> {\left( {7 - 2x} \right)^3} = {3^3} \hfill \\<br /> 7 - 2x = 3 \hfill \\<br /> 2x = 7 - 3 \hfill \\<br /> 2x = 4 \hfill \\<br /> x = 2 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%7B%5Cleft(%20%7B7%20-%202x%7D%20%5Cright)%5E3%7D%20%3D%20%7B3%5E3%7D%20%5Chfill%20%5C%5C%0A%20%207%20-%202x%20%3D%203%20%5Chfill%20%5C%5C%0A%20%202x%20%3D%207%20-%203%20%5Chfill%20%5C%5C%0A%20%202x%20%3D%204%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%202%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="129" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%7B%5Cleft(%20%7B7%20-%202x%7D%20%5Cright)%5E3%7D%20%3D%20%7B3%5E3%7D%20%5Chfill%20%5C%5C%0A%20%207%20-%202x%20%3D%203%20%5Chfill%20%5C%5C%0A%20%202x%20%3D%207%20-%203%20%5Chfill%20%5C%5C%0A%20%202x%20%3D%204%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%202%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 129px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 123px;" width="123" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 2</p></div></div><div class="tips" style="background: rgb(246, 246, 246); border-color: rgb(2, 174, 239); border-image: initial; border-style: solid; border-width: 1px 1px 1px 8px; color: #0072bc; font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 8px; padding: 8px 12px 2px; quotes: none;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Ví dụ 3:</strong> Tìm x biết</p><table border="0" style="border-collapse: collapse; border-spacing: 0px; border: 0px; font: inherit; margin: 0px 0px 16px; max-width: 100%; overflow: auto; padding: 0px;"><tbody><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) <img alt="\left[ {\left( {6x - 39} \right):7} \right].4 = 12" class="lazy loaded" data-latex="\left[ {\left( {6x - 39} \right):7} \right].4 = 12" data-src="https://tex.vdoc.vn?tex=%5Cleft%5B%20%7B%5Cleft(%20%7B6x%20-%2039%7D%20%5Cright)%3A7%7D%20%5Cright%5D.4%20%3D%2012" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=%5Cleft%5B%20%7B%5Cleft(%20%7B6x%20-%2039%7D%20%5Cright)%3A7%7D%20%5Cright%5D.4%20%3D%2012" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 172px;" width="172" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) <img alt="\left( {{7^3} + {5^2}} \right)x + \left( {{7^3} - {5^2}} \right)x - {10^3} = 372" class="lazy loaded" data-latex="\left( {{7^3} + {5^2}} \right)x + \left( {{7^3} - {5^2}} \right)x - {10^3} = 372" data-src="https://tex.vdoc.vn?tex=%5Cleft(%20%7B%7B7%5E3%7D%20%2B%20%7B5%5E2%7D%7D%20%5Cright)x%20%2B%20%5Cleft(%20%7B%7B7%5E3%7D%20-%20%7B5%5E2%7D%7D%20%5Cright)x%20-%20%7B10%5E3%7D%20%3D%20372" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%5Cleft(%20%7B%7B7%5E3%7D%20%2B%20%7B5%5E2%7D%7D%20%5Cright)x%20%2B%20%5Cleft(%20%7B%7B7%5E3%7D%20-%20%7B5%5E2%7D%7D%20%5Cright)x%20-%20%7B10%5E3%7D%20%3D%20372" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 303px;" width="303" /></p></td></tr><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">c) <img alt="2448.\left[ {119 - \left( {x - 6} \right)} \right] = 24" class="lazy loaded" data-latex="2448.\left[ {119 - \left( {x - 6} \right)} \right] = 24" data-src="https://tex.vdoc.vn?tex=2448.%5Cleft%5B%20%7B119%20-%20%5Cleft(%20%7Bx%20-%206%7D%20%5Cright)%7D%20%5Cright%5D%20%3D%2024" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=2448.%5Cleft%5B%20%7B119%20-%20%5Cleft(%20%7Bx%20-%206%7D%20%5Cright)%7D%20%5Cright%5D%20%3D%2024" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 207px;" width="207" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">d) <img alt="{\left( {x - 4} \right)^3}:{2^5} = 16" class="lazy loaded" data-latex="{\left( {x - 4} \right)^3}:{2^5} = 16" data-src="https://tex.vdoc.vn?tex=%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%3A%7B2%5E5%7D%20%3D%2016" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%3A%7B2%5E5%7D%20%3D%2016" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 142px;" width="142" /></p></td></tr></tbody></table></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Hướng dẫn giải</strong></p><div class="textview-row" style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px; padding: 0px;"><div class="col-two" style="border: 0px; font: inherit; margin: 0px; padding: 0px;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) <img alt="\left[ {\left( {6x - 39} \right):7} \right].4 = 12" class="lazy loaded" data-latex="\left[ {\left( {6x - 39} \right):7} \right].4 = 12" data-src="https://tex.vdoc.vn?tex=%5Cleft%5B%20%7B%5Cleft(%20%7B6x%20-%2039%7D%20%5Cright)%3A7%7D%20%5Cright%5D.4%20%3D%2012" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=%5Cleft%5B%20%7B%5Cleft(%20%7B6x%20-%2039%7D%20%5Cright)%3A7%7D%20%5Cright%5D.4%20%3D%2012" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 172px;" width="172" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> \left( {6x - 39} \right):7 = 12:4 \hfill \\<br /> \left( {6x - 39} \right):7 = 3 \hfill \\<br /> 6x - 39 = 3.7 \hfill \\<br /> 6x - 39 = 21 \hfill \\<br /> 6x = 21 + 39 \hfill \\<br /> 6x = 60 \hfill \\<br /> x = 60:6 = 10 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> \left( {6x - 39} \right):7 = 12:4 \hfill \\<br /> \left( {6x - 39} \right):7 = 3 \hfill \\<br /> 6x - 39 = 3.7 \hfill \\<br /> 6x - 39 = 21 \hfill \\<br /> 6x = 21 + 39 \hfill \\<br /> 6x = 60 \hfill \\<br /> x = 60:6 = 10 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%5Cleft(%20%7B6x%20-%2039%7D%20%5Cright)%3A7%20%3D%2012%3A4%20%5Chfill%20%5C%5C%0A%20%20%5Cleft(%20%7B6x%20-%2039%7D%20%5Cright)%3A7%20%3D%203%20%5Chfill%20%5C%5C%0A%20%206x%20-%2039%20%3D%203.7%20%5Chfill%20%5C%5C%0A%20%206x%20-%2039%20%3D%2021%20%5Chfill%20%5C%5C%0A%20%206x%20%3D%2021%20%2B%2039%20%5Chfill%20%5C%5C%0A%20%206x%20%3D%2060%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2060%3A6%20%3D%2010%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="180" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%5Cleft(%20%7B6x%20-%2039%7D%20%5Cright)%3A7%20%3D%2012%3A4%20%5Chfill%20%5C%5C%0A%20%20%5Cleft(%20%7B6x%20-%2039%7D%20%5Cright)%3A7%20%3D%203%20%5Chfill%20%5C%5C%0A%20%206x%20-%2039%20%3D%203.7%20%5Chfill%20%5C%5C%0A%20%206x%20-%2039%20%3D%2021%20%5Chfill%20%5C%5C%0A%20%206x%20%3D%2021%20%2B%2039%20%5Chfill%20%5C%5C%0A%20%206x%20%3D%2060%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2060%3A6%20%3D%2010%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 180px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 175px;" width="175" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 10</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">c) <img alt="2448.\left[ {119 - \left( {x - 6} \right)} \right] = 24" class="lazy loaded" data-latex="2448.\left[ {119 - \left( {x - 6} \right)} \right] = 24" data-src="https://tex.vdoc.vn?tex=2448.%5Cleft%5B%20%7B119%20-%20%5Cleft(%20%7Bx%20-%206%7D%20%5Cright)%7D%20%5Cright%5D%20%3D%2024" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=2448.%5Cleft%5B%20%7B119%20-%20%5Cleft(%20%7Bx%20-%206%7D%20%5Cright)%7D%20%5Cright%5D%20%3D%2024" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 207px;" width="207" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> 119 - \left( {x - 6} \right) = 2448:24 \hfill \\<br /> 119 - \left( {x - 6} \right) = 102 \hfill \\<br /> x - 6 = 119 - 102 \hfill \\<br /> x - 6 = 17 \hfill \\<br /> x = 6 + 17 = 23 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> 119 - \left( {x - 6} \right) = 2448:24 \hfill \\<br /> 119 - \left( {x - 6} \right) = 102 \hfill \\<br /> x - 6 = 119 - 102 \hfill \\<br /> x - 6 = 17 \hfill \\<br /> x = 6 + 17 = 23 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%20119%20-%20%5Cleft(%20%7Bx%20-%206%7D%20%5Cright)%20%3D%202448%3A24%20%5Chfill%20%5C%5C%0A%20%20119%20-%20%5Cleft(%20%7Bx%20-%206%7D%20%5Cright)%20%3D%20102%20%5Chfill%20%5C%5C%0A%20%20x%20-%206%20%3D%20119%20-%20102%20%5Chfill%20%5C%5C%0A%20%20x%20-%206%20%3D%2017%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%206%20%2B%2017%20%3D%2023%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="127" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%20119%20-%20%5Cleft(%20%7Bx%20-%206%7D%20%5Cright)%20%3D%202448%3A24%20%5Chfill%20%5C%5C%0A%20%20119%20-%20%5Cleft(%20%7Bx%20-%206%7D%20%5Cright)%20%3D%20102%20%5Chfill%20%5C%5C%0A%20%20x%20-%206%20%3D%20119%20-%20102%20%5Chfill%20%5C%5C%0A%20%20x%20-%206%20%3D%2017%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%206%20%2B%2017%20%3D%2023%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 127px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 210px;" width="210" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 23</p></div><div class="col-two" style="border: 0px; font: inherit; margin: 0px; padding: 0px;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) <img alt="\left( {{7^3} + {5^2}} \right)x + \left( {{7^3} - {5^2}} \right)x - {10^3} = 372" class="lazy loaded" data-latex="\left( {{7^3} + {5^2}} \right)x + \left( {{7^3} - {5^2}} \right)x - {10^3} = 372" data-src="https://tex.vdoc.vn?tex=%5Cleft(%20%7B%7B7%5E3%7D%20%2B%20%7B5%5E2%7D%7D%20%5Cright)x%20%2B%20%5Cleft(%20%7B%7B7%5E3%7D%20-%20%7B5%5E2%7D%7D%20%5Cright)x%20-%20%7B10%5E3%7D%20%3D%20372" data-type="0" data-was-processed="true" height="25" src="https://tex.vdoc.vn/?tex=%5Cleft(%20%7B%7B7%5E3%7D%20%2B%20%7B5%5E2%7D%7D%20%5Cright)x%20%2B%20%5Cleft(%20%7B%7B7%5E3%7D%20-%20%7B5%5E2%7D%7D%20%5Cright)x%20-%20%7B10%5E3%7D%20%3D%20372" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 25px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 291px;" width="291" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> \left( {{7^3} + {5^2} + {7^3} - {5^2}} \right).x = 372 + {10^3} \hfill \\<br /> \left( {{7^3} + {7^3}} \right).x = 1372 \hfill \\<br /> 686.x = 1372 \hfill \\<br /> x = 1372:686 \hfill \\<br /> x = 2 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> \left( {{7^3} + {5^2} + {7^3} - {5^2}} \right).x = 372 + {10^3} \hfill \\<br /> \left( {{7^3} + {7^3}} \right).x = 1372 \hfill \\<br /> 686.x = 1372 \hfill \\<br /> x = 1372:686 \hfill \\<br /> x = 2 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%5Cleft(%20%7B%7B7%5E3%7D%20%2B%20%7B5%5E2%7D%20%2B%20%7B7%5E3%7D%20-%20%7B5%5E2%7D%7D%20%5Cright).x%20%3D%20372%20%2B%20%7B10%5E3%7D%20%5Chfill%20%5C%5C%0A%20%20%5Cleft(%20%7B%7B7%5E3%7D%20%2B%20%7B7%5E3%7D%7D%20%5Cright).x%20%3D%201372%20%5Chfill%20%5C%5C%0A%20%20686.x%20%3D%201372%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%201372%3A686%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%202%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="134" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%5Cleft(%20%7B%7B7%5E3%7D%20%2B%20%7B5%5E2%7D%20%2B%20%7B7%5E3%7D%20-%20%7B5%5E2%7D%7D%20%5Cright).x%20%3D%20372%20%2B%20%7B10%5E3%7D%20%5Chfill%20%5C%5C%0A%20%20%5Cleft(%20%7B%7B7%5E3%7D%20%2B%20%7B7%5E3%7D%7D%20%5Cright).x%20%3D%201372%20%5Chfill%20%5C%5C%0A%20%20686.x%20%3D%201372%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%201372%3A686%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%202%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 134px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 287px;" width="287" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">d) <img alt="{\left( {x - 4} \right)^3}:{2^5} = 16" class="lazy loaded" data-latex="{\left( {x - 4} \right)^3}:{2^5} = 16" data-src="https://tex.vdoc.vn?tex=%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%3A%7B2%5E5%7D%20%3D%2016" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%3A%7B2%5E5%7D%20%3D%2016" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 142px;" width="142" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><img alt="\begin{matrix}<br /> {\left( {x - 4} \right)^3}:{2^5} = 16 \hfill \\<br /> {\left( {x - 4} \right)^3} = {16.2^5} \hfill \\<br /> {\left( {x - 4} \right)^3} = 512 \hfill \\<br /> {\left( {x - 4} \right)^3} = {8^3} \hfill \\<br /> x - 4 = 8 \hfill \\<br /> x = 8 + 4 \hfill \\<br /> x = 12 \hfill \\ <br />\end{matrix}" class="lazy loaded" data-latex="\begin{matrix}<br /> {\left( {x - 4} \right)^3}:{2^5} = 16 \hfill \\<br /> {\left( {x - 4} \right)^3} = {16.2^5} \hfill \\<br /> {\left( {x - 4} \right)^3} = 512 \hfill \\<br /> {\left( {x - 4} \right)^3} = {8^3} \hfill \\<br /> x - 4 = 8 \hfill \\<br /> x = 8 + 4 \hfill \\<br /> x = 12 \hfill \\ <br />\end{matrix}" data-src="https://tex.vdoc.vn?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%3A%7B2%5E5%7D%20%3D%2016%20%5Chfill%20%5C%5C%0A%20%20%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%20%3D%20%7B16.2%5E5%7D%20%5Chfill%20%5C%5C%0A%20%20%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%20%3D%20512%20%5Chfill%20%5C%5C%0A%20%20%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%20%3D%20%7B8%5E3%7D%20%5Chfill%20%5C%5C%0A%20%20x%20-%204%20%3D%208%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%208%20%2B%204%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2012%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" data-type="0" data-was-processed="true" height="192" src="https://tex.vdoc.vn/?tex=%5Cbegin%7Bmatrix%7D%0A%20%20%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%3A%7B2%5E5%7D%20%3D%2016%20%5Chfill%20%5C%5C%0A%20%20%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%20%3D%20%7B16.2%5E5%7D%20%5Chfill%20%5C%5C%0A%20%20%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%20%3D%20512%20%5Chfill%20%5C%5C%0A%20%20%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%20%3D%20%7B8%5E3%7D%20%5Chfill%20%5C%5C%0A%20%20x%20-%204%20%3D%208%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%208%20%2B%204%20%5Chfill%20%5C%5C%0A%20%20x%20%3D%2012%20%5Chfill%20%5C%5C%20%0A%5Cend%7Bmatrix%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 192px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 148px;" width="148" /></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 12</p></div></div><div class="tips" style="background: rgb(246, 246, 246); border-color: rgb(2, 174, 239); border-image: initial; border-style: solid; border-width: 1px 1px 1px 8px; color: #0072bc; font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 8px; padding: 8px 12px 2px; quotes: none;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Ví dụ 4:</strong> Tìm số tự nhiên x biết:</p><table border="0" style="border-collapse: collapse; border-spacing: 0px; border: 0px; font: inherit; margin: 0px 0px 16px; max-width: 100%; overflow: auto; padding: 0px;"><tbody><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) (17x - 11)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">3</sup> = 216</p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) 8 . 6 + 288 : (x - 3)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">2</sup> = 50</p></td></tr></tbody></table></div><div class="adbox in-article" style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 16px; padding: 0px; text-align: center;"></div><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Hướng dẫn giải</strong></p><div class="textview-row" style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px; padding: 0px;"><div class="col-two" style="border: 0px; font: inherit; margin: 0px; padding: 0px;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) (17x - 11)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">3</sup> = 216</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">(17x - 11)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">3</sup> = 6<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">3</sup></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">17x - 11 = 6</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">17x = 6 + 11</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">17x = 17</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 17 : 17</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 1</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 1</p></div><div class="col-two" style="border: 0px; font: inherit; margin: 0px; padding: 0px;"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) 8 . 6 + 288 : (x - 3)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">2</sup> = 50</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">48 + 288 : (x - 3)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">2</sup> = 50</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">288 : (x - 3)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">2</sup> = 50 - 48</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">288 : (x - 3)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">2</sup> = 2</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">(x - 3)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">2</sup> = 288 : 2</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">(x - 3)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">2</sup> = 144</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">(x - 3)<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">2</sup> = 12<sup style="border: 0px; font: inherit; margin: 0px; padding: 0px;">2</sup></p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x  - 3 = 12</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 12 + 3</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">x = 15</p><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">Vậy x = 15</p></div></div><h2 id="mcetoc_1fn14c1c75" style="background-color: white; border: 0px; color: #45710a; font-family: arial; font-size: 22px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 32px; margin: 10px 0px; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">C. Tìm số nguyên x biết, Tìm số tự nhiên x biết</strong></h2><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Bài 1: </strong>Tìm tổng của tất cả các số nguyên thỏa mãn:</p><table border="0" style="background-color: white; border-collapse: collapse; border-spacing: 0px; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 16px; max-width: 100%; overflow: auto; padding: 0px;"><tbody><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) <img alt="- 4 < x < 3" class="lazy loaded" data-latex="- 4 < x < 3" data-src="https://tex.vdoc.vn?tex=-%204%20%3C%20x%20%3C%203" data-type="0" data-was-processed="true" height="17" src="https://tex.vdoc.vn/?tex=-%204%20%3C%20x%20%3C%203" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 17px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 93px;" width="93" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) <img alt="- 1 \leqslant x \leqslant 4" class="lazy loaded" data-latex="- 1 \leqslant x \leqslant 4" data-src="https://tex.vdoc.vn?tex=-%201%20%5Cleqslant%20x%20%5Cleqslant%204" data-type="0" data-was-processed="true" height="17" src="https://tex.vdoc.vn/?tex=-%201%20%5Cleqslant%20x%20%5Cleqslant%204" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 17px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 93px;" width="93" /></p></td></tr></tbody></table><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Bài 2: </strong>Tìm x biết:</p><table border="0" style="background-color: white; border-collapse: collapse; border-spacing: 0px; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 16px; max-width: 100%; overflow: auto; padding: 0px;"><tbody><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) <img alt="{4^x} = 16" class="lazy loaded" data-latex="{4^x} = 16" data-src="https://tex.vdoc.vn?tex=%7B4%5Ex%7D%20%3D%2016" data-type="0" data-was-processed="true" height="17" src="https://tex.vdoc.vn/?tex=%7B4%5Ex%7D%20%3D%2016" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 17px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 62px;" width="62" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) <img alt="{2.3^x} = {10.3^{12}} + {8.27^4}" class="lazy loaded" data-latex="{2.3^x} = {10.3^{12}} + {8.27^4}" data-src="https://tex.vdoc.vn?tex=%7B2.3%5Ex%7D%20%3D%20%7B10.3%5E%7B12%7D%7D%20%2B%20%7B8.27%5E4%7D" data-type="0" data-was-processed="true" height="21" src="https://tex.vdoc.vn/?tex=%7B2.3%5Ex%7D%20%3D%20%7B10.3%5E%7B12%7D%7D%20%2B%20%7B8.27%5E4%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 21px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 170px;" width="170" /></p></td></tr><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">c) <img alt="{\left( {25 - 2x} \right)^3}:5 - {3^2} = {4^2}" class="lazy loaded" data-latex="{\left( {25 - 2x} \right)^3}:5 - {3^2} = {4^2}" data-src="https://tex.vdoc.vn?tex=%7B%5Cleft(%20%7B25%20-%202x%7D%20%5Cright)%5E3%7D%3A5%20-%20%7B3%5E2%7D%20%3D%20%7B4%5E2%7D" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%7B%5Cleft(%20%7B25%20-%202x%7D%20%5Cright)%5E3%7D%3A5%20-%20%7B3%5E2%7D%20%3D%20%7B4%5E2%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 192px;" width="192" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">d) <img alt="{\left( {x - 4} \right)^3}:{2^5} = 16" class="lazy loaded" data-latex="{\left( {x - 4} \right)^3}:{2^5} = 16" data-src="https://tex.vdoc.vn?tex=%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%3A%7B2%5E5%7D%20%3D%2016" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%3A%7B2%5E5%7D%20%3D%2016" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 142px;" width="142" /></p></td></tr><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">e) <img alt="x + 5 - \left( { - 11} \right) = 31 - 48" class="lazy loaded" data-latex="x + 5 - \left( { - 11} \right) = 31 - 48" data-src="https://tex.vdoc.vn?tex=x%20%2B%205%20-%20%5Cleft(%20%7B%20-%2011%7D%20%5Cright)%20%3D%2031%20-%2048" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=x%20%2B%205%20-%20%5Cleft(%20%7B%20-%2011%7D%20%5Cright)%20%3D%2031%20-%2048" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 198px;" width="198" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">f) <img alt="x - \left( {36 - x} \right) = - 48 - 12 + 112" class="lazy loaded" data-latex="x - \left( {36 - x} \right) = - 48 - 12 + 112" data-src="https://tex.vdoc.vn?tex=x%20-%20%5Cleft(%20%7B36%20-%20x%7D%20%5Cright)%20%3D%20%20-%2048%20-%2012%20%2B%20112" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=x%20-%20%5Cleft(%20%7B36%20-%20x%7D%20%5Cright)%20%3D%20%20-%2048%20-%2012%20%2B%20112" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 250px;" width="250" /></p></td></tr><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">g) <img alt="72:{\left( {x - 2} \right)^2} = 8" class="lazy loaded" data-latex="72:{\left( {x - 2} \right)^2} = 8" data-src="https://tex.vdoc.vn?tex=72%3A%7B%5Cleft(%20%7Bx%20-%202%7D%20%5Cright)%5E2%7D%20%3D%208" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=72%3A%7B%5Cleft(%20%7Bx%20-%202%7D%20%5Cright)%5E2%7D%20%3D%208" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 134px;" width="134" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">h) <img alt="75 - 5{\left( {x - 3} \right)^3} = 700" class="lazy loaded" data-latex="75 - 5{\left( {x - 3} \right)^3} = 700" data-src="https://tex.vdoc.vn?tex=75%20-%205%7B%5Cleft(%20%7Bx%20-%203%7D%20%5Cright)%5E3%7D%20%3D%20700" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=75%20-%205%7B%5Cleft(%20%7Bx%20-%203%7D%20%5Cright)%5E3%7D%20%3D%20700" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 169px;" width="169" /></p></td></tr></tbody></table><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Bài 3: </strong>Tìm số nguyên x biết:</p><table border="0" style="background-color: white; border-collapse: collapse; border-spacing: 0px; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 16px; max-width: 100%; overflow: auto; padding: 0px;"><tbody><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) <img alt="{4^x} = 16" class="lazy loaded" data-latex="{4^x} = 16" data-src="https://tex.vdoc.vn?tex=%7B4%5Ex%7D%20%3D%2016" data-type="0" data-was-processed="true" height="17" src="https://tex.vdoc.vn/?tex=%7B4%5Ex%7D%20%3D%2016" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 17px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 62px;" width="62" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) <img alt="{2.3^x} = {10.3^{12}} + {8.27^4}" class="lazy loaded" data-latex="{2.3^x} = {10.3^{12}} + {8.27^4}" data-src="https://tex.vdoc.vn?tex=%7B2.3%5Ex%7D%20%3D%20%7B10.3%5E%7B12%7D%7D%20%2B%20%7B8.27%5E4%7D" data-type="0" data-was-processed="true" height="21" src="https://tex.vdoc.vn/?tex=%7B2.3%5Ex%7D%20%3D%20%7B10.3%5E%7B12%7D%7D%20%2B%20%7B8.27%5E4%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 21px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 170px;" width="170" /></p></td></tr><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">c) <img alt="{\left( {25 - 2x} \right)^3}:5 - {3^2} = {4^2}" class="lazy loaded" data-latex="{\left( {25 - 2x} \right)^3}:5 - {3^2} = {4^2}" data-src="https://tex.vdoc.vn?tex=%7B%5Cleft(%20%7B25%20-%202x%7D%20%5Cright)%5E3%7D%3A5%20-%20%7B3%5E2%7D%20%3D%20%7B4%5E2%7D" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%7B%5Cleft(%20%7B25%20-%202x%7D%20%5Cright)%5E3%7D%3A5%20-%20%7B3%5E2%7D%20%3D%20%7B4%5E2%7D" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 192px;" width="192" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">d) <img alt="{\left( {x - 4} \right)^3}:{2^5} = 16" class="lazy loaded" data-latex="{\left( {x - 4} \right)^3}:{2^5} = 16" data-src="https://tex.vdoc.vn?tex=%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%3A%7B2%5E5%7D%20%3D%2016" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=%7B%5Cleft(%20%7Bx%20-%204%7D%20%5Cright)%5E3%7D%3A%7B2%5E5%7D%20%3D%2016" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 142px;" width="142" /></p></td></tr><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">e) <img alt="x + 5 - \left( { - 11} \right) = 31 - 48" class="lazy loaded" data-latex="x + 5 - \left( { - 11} \right) = 31 - 48" data-src="https://tex.vdoc.vn?tex=x%20%2B%205%20-%20%5Cleft(%20%7B%20-%2011%7D%20%5Cright)%20%3D%2031%20-%2048" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=x%20%2B%205%20-%20%5Cleft(%20%7B%20-%2011%7D%20%5Cright)%20%3D%2031%20-%2048" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 198px;" width="198" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">f) <img alt="x - \left( {36 - x} \right) = - 48 - 12 + 112" class="lazy loaded" data-latex="x - \left( {36 - x} \right) = - 48 - 12 + 112" data-src="https://tex.vdoc.vn?tex=x%20-%20%5Cleft(%20%7B36%20-%20x%7D%20%5Cright)%20%3D%20%20-%2048%20-%2012%20%2B%20112" data-type="0" data-was-processed="true" height="22" src="https://tex.vdoc.vn/?tex=x%20-%20%5Cleft(%20%7B36%20-%20x%7D%20%5Cright)%20%3D%20%20-%2048%20-%2012%20%2B%20112" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 22px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 250px;" width="250" /></p></td></tr><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">g) <img alt="72:{\left( {x - 2} \right)^2} = 8" class="lazy loaded" data-latex="72:{\left( {x - 2} \right)^2} = 8" data-src="https://tex.vdoc.vn?tex=72%3A%7B%5Cleft(%20%7Bx%20-%202%7D%20%5Cright)%5E2%7D%20%3D%208" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=72%3A%7B%5Cleft(%20%7Bx%20-%202%7D%20%5Cright)%5E2%7D%20%3D%208" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 134px;" width="134" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">h) <img alt="75 - 5{\left( {x - 3} \right)^3} = 700" class="lazy loaded" data-latex="75 - 5{\left( {x - 3} \right)^3} = 700" data-src="https://tex.vdoc.vn?tex=75%20-%205%7B%5Cleft(%20%7Bx%20-%203%7D%20%5Cright)%5E3%7D%20%3D%20700" data-type="0" data-was-processed="true" height="26" src="https://tex.vdoc.vn/?tex=75%20-%205%7B%5Cleft(%20%7Bx%20-%203%7D%20%5Cright)%5E3%7D%20%3D%20700" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 26px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 169px;" width="169" /></p></td></tr></tbody></table><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;"><strong style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px;">Bài 4: </strong>Tìm số nguyên x biết</p><table border="0" style="background-color: white; border-collapse: collapse; border-spacing: 0px; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: inherit; margin: 0px 0px 16px; max-width: 100%; overflow: auto; padding: 0px;"><tbody><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">a) <img alt="6 \vdots \left( {x + 2} \right)" class="lazy loaded" data-latex="6 \vdots \left( {x + 2} \right)" data-src="https://tex.vdoc.vn?tex=6%20%5Cvdots%20%5Cleft(%20%7Bx%20%2B%202%7D%20%5Cright)" data-type="0" data-was-processed="true" height="32" src="https://tex.vdoc.vn/?tex=6%20%5Cvdots%20%5Cleft(%20%7Bx%20%2B%202%7D%20%5Cright)" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 32px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 75px;" width="75" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">b) <img alt="\left( {x + 13} \right) \vdots \left( {x + 8} \right)" class="lazy loaded" data-latex="\left( {x + 13} \right) \vdots \left( {x + 8} \right)" data-src="https://tex.vdoc.vn?tex=%5Cleft(%20%7Bx%20%2B%2013%7D%20%5Cright)%20%5Cvdots%20%5Cleft(%20%7Bx%20%2B%208%7D%20%5Cright)" data-type="0" data-was-processed="true" height="32" src="https://tex.vdoc.vn/?tex=%5Cleft(%20%7Bx%20%2B%2013%7D%20%5Cright)%20%5Cvdots%20%5Cleft(%20%7Bx%20%2B%208%7D%20%5Cright)" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 32px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 135px;" width="135" /></p></td></tr><tr><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">c) <img alt="\left( {3x + 2} \right) \vdots \left( {x - 3} \right)" class="lazy loaded" data-latex="\left( {3x + 2} \right) \vdots \left( {x - 3} \right)" data-src="https://tex.vdoc.vn?tex=%5Cleft(%20%7B3x%20%2B%202%7D%20%5Cright)%20%5Cvdots%20%5Cleft(%20%7Bx%20-%203%7D%20%5Cright)" data-type="0" data-was-processed="true" height="32" src="https://tex.vdoc.vn/?tex=%5Cleft(%20%7B3x%20%2B%202%7D%20%5Cright)%20%5Cvdots%20%5Cleft(%20%7Bx%20-%203%7D%20%5Cright)" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 32px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 135px;" width="135" /></p></td><td width="326"><p style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px;">d) <img alt="\left( {3x + 9} \right) \vdots \left( {2x + 1} \right)" class="lazy loaded" data-latex="\left( {3x + 9} \right) \vdots \left( {2x + 1} \right)" data-src="https://tex.vdoc.vn?tex=%5Cleft(%20%7B3x%20%2B%209%7D%20%5Cright)%20%5Cvdots%20%5Cleft(%20%7B2x%20%2B%201%7D%20%5Cright)" data-type="0" data-was-processed="true" height="32" src="https://tex.vdoc.vn/?tex=%5Cleft(%20%7B3x%20%2B%209%7D%20%5Cright)%20%5Cvdots%20%5Cleft(%20%7B2x%20%2B%201%7D%20%5Cright)" style="border: 0px solid rgb(204, 204, 204); font: inherit; height: 32px; margin: 0px; max-width: 100%; padding: 0px; vertical-align: middle; width: 144px;" width="144" /></p></td></tr></tbody></table><p style="background-color: white; border: 0px; color: rgba(0, 0, 0, 0.87); font-family: arial; font-size: 16px; font-stretch: inherit; font-variant-east-asian: inherit; font-variant-numeric: inherit; line-height: 1.625em; margin: 0px 0px 16px; overflow-wrap: break-word; padding: 0px; text-align: center;">---------------------------------------------</p>

TÌM X LỚP 6

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