Question

$\frac{9x}{2x + 1} = 7$
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Answer 1

$\frac{ 9x }{ 2x+1 } =7 \\ = 9x=7\left(2x+1\right) \\ = 9x=14x+7 \\ =9x-14x=7 \\ = -5x=7 \\ = x=\frac{7}{-5} \\ = x=-\frac{7}{5}$

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