$$-7x+6 = -9x-2$$
Answer
$$ x = -4 $$
Explanation
$$ \begin{aligned} -7x+6 &= -9x-2&& \text{move the $ \color{blue}{ -9x } $ to the left side and $ \color{blue}{ 6 }$ to the right} \\[1 em]-7x+9x &= -2-6&& \text{simplify left and right hand side} \\[1 em]2x &= -8&& \text{ divide both sides by $ 2 $ } \\[1 em]x &= -\frac{8}{2}&& \\[1 em]x &= -4&& \\[1 em] \end{aligned} $$
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