Question
$$2x+15 = 5x+6$$
Answer
$$ x = 3 $$
Explanation
$$ \begin{aligned} 2x+15 &= 5x+6&& \text{move the $ \color{blue}{ 5x } $ to the left side and $ \color{blue}{ 15 }$ to the right} \\[1 em]2x-5x &= 6-15&& \text{simplify left and right hand side} \\[1 em]-3x &= -9&& \text{ divide both sides by $ -3 $ } \\[1 em]x &= \frac{-9}{-3}&& \\[1 em]x &= 3&& \\[1 em] \end{aligned} $$
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