Question
$$2x+15 = -3x+40$$
Answer
$$ x = 5 $$
Explanation
$$ \begin{aligned} 2x+15 &= -3x+40&& \text{move the $ \color{blue}{ -3x } $ to the left side and $ \color{blue}{ 15 }$ to the right} \\[1 em]2x+3x &= 40-15&& \text{simplify left and right hand side} \\[1 em]5x &= 25&& \text{ divide both sides by $ 5 $ } \\[1 em]x &= \frac{25}{5}&& \\[1 em]x &= 5&& \\[1 em] \end{aligned} $$
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