Question
$$8x-3(2x+5) = 13$$
Answer
$$ x = 14 $$
Explanation
$$ \begin{aligned} 8x-3(2x+5) &= 13&& \text{simplify left side} \\[1 em]8x-(6x+15) &= 13&& \\[1 em]8x-6x-15 &= 13&& \\[1 em]2x-15 &= 13&& \text{ move -15 to the right } \\[1 em]2x &= 13+15&& \\[1 em]2x &= 28&& \text{ divide both sides by $ 2 $ } \\[1 em]x &= \frac{28}{2}&& \\[1 em]x &= 14&& \\[1 em] \end{aligned} $$
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