Question
$$6q-7 = 8+9q$$
Answer
$$ q = -5 $$
Explanation
$$ \begin{aligned} 6q-7 &= 8+9q&& \text{move the $ \color{blue}{ 9q } $ to the left side and $ \color{blue}{ -7 }$ to the right} \\[1 em]6q-9q &= 8+7&& \text{simplify left and right hand side} \\[1 em]-3q &= 15&& \text{ divide both sides by $ -3 $ } \\[1 em]q &= -\frac{15}{3}&& \\[1 em]q &= -5&& \\[1 em] \end{aligned} $$
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