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