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Trang chủ / Giải bài tập / Lớp 8 / Toán học / Bài 2: Phương Trình Bậc Nhất Một Ẩn Và Cách Giải
Bài 2: Phương Trình Bậc Nhất Một Ẩn Và Cách Giải
Hướng dẫn giải Bài 9 (Trang 10 SGK Toán Đại số 8, Tập 2)
<p>Giải các phương trình sau, vi&ecirc;́t s&ocirc;́ g&acirc;̀n đúng của m&ocirc;̃i nghi&ecirc;̣m ở dạng s&ocirc;́ th&acirc;̣p ph&acirc;n bằng các làm tròn đ&ecirc;́n hàng ph&acirc;̀n trăm</p> <p><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>a</mi><mo>)</mo><mn>3</mn><mi>x</mi><mo>-</mo><mn>11</mn><mo>=</mo><mn>0</mn><mspace linebreak="newline"/><mi>b</mi><mo>)</mo><mo>&#160;</mo><mn>12</mn><mo>+</mo><mn>7</mn><mi>x</mi><mo>=</mo><mn>0</mn><mspace linebreak="newline"/><mi>c</mi><mo>)</mo><mo>&#160;</mo><mn>10</mn><mo>-</mo><mn>4</mn><mi>x</mi><mo>=</mo><mn>2</mn><mi>x</mi><mo>-</mo><mn>3</mn></math></p> <p><strong>Giải</strong></p> <p><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>a</mi><mo>)</mo><mo>&#160;</mo><mn>3</mn><mi>x</mi><mo>-</mo><mn>11</mn><mo>=</mo><mn>0</mn><mo>&#8660;</mo><mn>3</mn><mi>x</mi><mo>=</mo><mn>11</mn><mo>&#8660;</mo><mi>x</mi><mo>=</mo><mn>11</mn><mo>:</mo><mn>3</mn><mo>&#8660;</mo><mi>x</mi><mo>&#8776;</mo><mn>3</mn><mo>,</mo><mn>67</mn><mspace linebreak="newline"/><mi>b</mi><mo>)</mo><mo>&#160;</mo><mn>12</mn><mo>+</mo><mn>7</mn><mi>x</mi><mo>=</mo><mn>0</mn><mo>&#8660;</mo><mn>7</mn><mi>x</mi><mo>=</mo><mo>-</mo><mn>12</mn><mo>&#8660;</mo><mi>x</mi><mo>=</mo><mo>-</mo><mn>12</mn><mo>:</mo><mn>7</mn><mo>&#8660;</mo><mi>x</mi><mo>&#8776;</mo><mo>-</mo><mn>1</mn><mo>,</mo><mn>71</mn><mspace linebreak="newline"/><mi>c</mi><mo>)</mo><mo>&#160;</mo><mn>10</mn><mo>-</mo><mn>4</mn><mi>x</mi><mo>=</mo><mn>2</mn><mi>x</mi><mo>-</mo><mn>3</mn><mo>&#8660;</mo><mo>-</mo><mn>2</mn><mi>x</mi><mo>-</mo><mn>4</mn><mi>x</mi><mo>=</mo><mo>-</mo><mn>3</mn><mo>-</mo><mn>10</mn><mo>&#8660;</mo><mo>-</mo><mn>6</mn><mi>x</mi><mo>=</mo><mo>-</mo><mn>13</mn><mo>&#8660;</mo><mi>x</mi><mo>=</mo><mfrac><mn>13</mn><mn>6</mn></mfrac><mo>&#8660;</mo><mi>x</mi><mo>&#8776;</mo><mn>2</mn><mo>,</mo><mn>17</mn></math></p>
Hướng dẫn Giải Bài 9 (Trang 10, SGK Toán 8, Tập 2, Phần Đại Số)
GV: GV colearn
Xem lời giải bài tập khác cùng bài
Hướng dẫn giải Bài 6 (Trang 9 SGK Toán Đại số 8, Tập 2)
Xem lời giải
<div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div 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class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div 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class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise">Hướng dẫn giải Bài 7 (Trang 10 SGK Toán Đại số 8, Tập 2)</div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> 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Xem lời giải
<div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div 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class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise"> <div class="n-content-exercise">Hướng dẫn giải Bài 8 (Trang 10 SGK Toán Đại số 8, Tập 2)</div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> 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Hướng dẫn Giải Bài 9 (Trang 10, SGK Toán 8, Tập 2, Phần Đại Số)
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