Question
$$2m = 4(m-4)$$
Answer
$$ m = 8 $$
Explanation
$$ \begin{aligned} 2m &= 4(m-4)&& \text{simplify right side} \\[1 em]2m &= 4m-16&& \text{move the $ \color{blue}{ 4m } $ to the left side} \\[1 em]2m-4m &= -16&& \text{simplify left side} \\[1 em]-2m &= -16&& \text{ divide both sides by $ -2 $ } \\[1 em]m &= \frac{-16}{-2}&& \\[1 em]m &= 8&& \\[1 em] \end{aligned} $$
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