Question
$$-x-2 = 2x+10$$
Answer
$$ x = -4 $$
Explanation
$$ \begin{aligned} -x-2 &= 2x+10&& \text{move the $ \color{blue}{ 2x } $ to the left side and $ \color{blue}{ -2 }$ to the right} \\[1 em]-x-2x &= 10+2&& \text{simplify left and right hand side} \\[1 em]-3x &= 12&& \text{ divide both sides by $ -3 $ } \\[1 em]x &= -\frac{12}{3}&& \\[1 em]x &= -4&& \\[1 em] \end{aligned} $$
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