Question
$$30-3x = 2x$$
Answer
$$ x = 6 $$
Explanation
$$ \begin{aligned} 30-3x &= 2x&& \text{move the $ \color{blue}{ 2x } $ to the left side and $ \color{blue}{ 30 }$ to the right} \\[1 em]-3x-2x &= -30&& \text{simplify left side} \\[1 em]-5x &= -30&& \text{ divide both sides by $ -5 $ } \\[1 em]x &= \frac{-30}{-5}&& \\[1 em]x &= 6&& \\[1 em] \end{aligned} $$
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