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