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