Question
$$7m+12 = 3m+36$$
Answer
$$ m = 6 $$
Explanation
$$ \begin{aligned} 7m+12 &= 3m+36&& \text{move the $ \color{blue}{ 3m } $ to the left side and $ \color{blue}{ 12 }$ to the right} \\[1 em]7m-3m &= 36-12&& \text{simplify left and right hand side} \\[1 em]4m &= 24&& \text{ divide both sides by $ 4 $ } \\[1 em]m &= \frac{24}{4}&& \\[1 em]m &= 6&& \\[1 em] \end{aligned} $$
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