Question
$$x = \frac{12}{3}+4$$
Answer
$$ x = 8 $$
Explanation
$$ \begin{aligned} x &= \frac{12}{3}+4&& \text{multiply ALL terms by } \color{blue}{ 3 }. \\[1 em]3x &= 3\cdot\frac{12}{3}+3\cdot4&& \text{cancel out the denominators} \\[1 em]3x &= 12+12&& \text{simplify right side} \\[1 em]3x &= 24&& \text{ divide both sides by $ 3 $ } \\[1 em]x &= \frac{24}{3}&& \\[1 em]x &= 8&& \\[1 em] \end{aligned} $$
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