Question
$$3x+4 = 5x-12$$
Answer
$$ x = 8 $$
Explanation
$$ \begin{aligned} 3x+4 &= 5x-12&& \text{move the $ \color{blue}{ 5x } $ to the left side and $ \color{blue}{ 4 }$ to the right} \\[1 em]3x-5x &= -12-4&& \text{simplify left and right hand side} \\[1 em]-2x &= -16&& \text{ divide both sides by $ -2 $ } \\[1 em]x &= \frac{-16}{-2}&& \\[1 em]x &= 8&& \\[1 em] \end{aligned} $$
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