## Làm giúp em bài này vs ạ . Em cảm ơn

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Làm giúp em bài này vs ạ . Em cảm ơn

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3 years 2021-05-22T03:27:48+00:00 1 Answers 5 views 0

$\begin{array}{l} a)\left( {3x – 4} \right).9 – 3.\left( {9x – 5} \right) = 2\left( {5x + 1} \right)\\ \Leftrightarrow 27x – 36 – 27x + 15 = 10x + 2\\ \Leftrightarrow 10x = – 23\\ \Leftrightarrow x = \dfrac{{ – 23}}{{10}}\\ b)11\left( {2 – 3x} \right) – \left( {4x – 2} \right).8 = – 3\left( {2x – 5} \right)\\ \Leftrightarrow 22 – 33x – 32x + 16 = – 6x + 15\\ \Leftrightarrow 59x = 23\\ \Leftrightarrow x = \dfrac{{23}}{{59}}\\ c)\left( {4x – 5} \right).6 – 4\left( {6x + 2} \right) = – 7x – 5\\ \Leftrightarrow 24x – 30 – 24x – 8 = – 7x – 5\\ \Leftrightarrow 7x = 33\\ \Leftrightarrow x = \dfrac{{33}}{7}\\ d)\left( {4x – 3} \right).2 – 3\left( {13x + 4} \right) = 9\left( {2x – 1} \right) – 3\left( {x – 2} \right)\\ \Leftrightarrow 8x – 6 – 39x – 12 = 18x – 9 – 3x + 6\\ \Leftrightarrow – 31x – 18 = 15x – 3\\ \Leftrightarrow 46x = – 15\\ \Leftrightarrow x = \dfrac{{ – 15}}{{46}} \end{array}$