Question
$$2x+17 = 5-x$$
Answer
$$ x = -4 $$
Explanation
$$ \begin{aligned} 2x+17 &= 5-x&& \text{move the $ \color{blue}{ -x } $ to the left side and $ \color{blue}{ 17 }$ to the right} \\[1 em]2x+x &= 5-17&& \text{simplify left and right hand side} \\[1 em]3x &= -12&& \text{ divide both sides by $ 3 $ } \\[1 em]x &= -\frac{12}{3}&& \\[1 em]x &= -4&& \\[1 em] \end{aligned} $$
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