Question
$$89+x = 2-2x$$
Answer
$$ x = -29 $$
Explanation
$$ \begin{aligned} 89+x &= 2-2x&& \text{move the $ \color{blue}{ -2x } $ to the left side and $ \color{blue}{ 89 }$ to the right} \\[1 em]x+2x &= 2-89&& \text{simplify left and right hand side} \\[1 em]3x &= -87&& \text{ divide both sides by $ 3 $ } \\[1 em]x &= -\frac{87}{3}&& \\[1 em]x &= -29&& \\[1 em] \end{aligned} $$
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