Question
$$3x+20 = 11x-16$$
Answer
$$ x = \dfrac{9}{2} $$
Explanation
$$ \begin{aligned} 3x+20 &= 11x-16&& \text{move the $ \color{blue}{ 11x } $ to the left side and $ \color{blue}{ 20 }$ to the right} \\[1 em]3x-11x &= -16-20&& \text{simplify left and right hand side} \\[1 em]-8x &= -36&& \text{ divide both sides by $ -8 $ } \\[1 em]x &= \frac{-36}{-8}&& \\[1 em]x &= \frac{9}{2}&& \\[1 em] \end{aligned} $$
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