Question
$$-4-3x = -4x-16$$
Answer
$$ x = -12 $$
Explanation
$$ \begin{aligned} -4-3x &= -4x-16&& \text{move the $ \color{blue}{ -4x } $ to the left side and $ \color{blue}{ -4 }$ to the right} \\[1 em]-3x+4x &= -16+4&& \text{simplify left and right hand side} \\[1 em]x &= -12&& \\[1 em]x &= -12&& \\[1 em] \end{aligned} $$
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