Question
$$-9x+28 = 6x+13$$
Answer
$$ x = 1 $$
Explanation
$$ \begin{aligned} -9x+28 &= 6x+13&& \text{move the $ \color{blue}{ 6x } $ to the left side and $ \color{blue}{ 28 }$ to the right} \\[1 em]-9x-6x &= 13-28&& \text{simplify left and right hand side} \\[1 em]-15x &= -15&& \text{ divide both sides by $ -15 $ } \\[1 em]x &= \frac{-15}{-15}&& \\[1 em]x &= 1&& \\[1 em] \end{aligned} $$
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