Question
$$38+7a = 8a+32$$
Answer
$$ a = 6 $$
Explanation
$$ \begin{aligned} 38+7a &= 8a+32&& \text{move the $ \color{blue}{ 8a } $ to the left side and $ \color{blue}{ 38 }$ to the right} \\[1 em]7a-8a &= 32-38&& \text{simplify left and right hand side} \\[1 em]-a &= -6&& \text{switch signs on both sides} \\[1 em]a &= 6&& \\[1 em] \end{aligned} $$
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