Question
$$-4(x+2)-x+2 = -21$$
Answer
$$ x = 3 $$
Explanation
$$ \begin{aligned} -4(x+2)-x+2 &= -21&& \text{simplify left side} \\[1 em]-(4x+8)-x+2 &= -21&& \\[1 em]-4x-8-x+2 &= -21&& \\[1 em]-5x-6 &= -21&& \text{ move -6 to the right } \\[1 em]-5x &= -21+6&& \\[1 em]-5x &= -15&& \text{ divide both sides by $ -5 $ } \\[1 em]x &= \frac{-15}{-5}&& \\[1 em]x &= 3&& \\[1 em] \end{aligned} $$
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