Question
$$2+14a = -8+9a$$
Answer
$$ a = -2 $$
Explanation
$$ \begin{aligned} 2+14a &= -8+9a&& \text{move the $ \color{blue}{ 9a } $ to the left side and $ \color{blue}{ 2 }$ to the right} \\[1 em]14a-9a &= -8-2&& \text{simplify left and right hand side} \\[1 em]5a &= -10&& \text{ divide both sides by $ 5 $ } \\[1 em]a &= -\frac{10}{5}&& \\[1 em]a &= -2&& \\[1 em] \end{aligned} $$
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