$$4 \cdot \frac{x}{12} = \frac{24}{12}$$
Answer
$$ x = 6 $$
Explanation
$$ \begin{aligned} 4 \cdot \frac{x}{12} &= \frac{24}{12}&& \text{multiply ALL terms by } \color{blue}{ 12 }. \\[1 em]12\cdot4 \cdot \frac{x}{12} &= 12\cdot\frac{24}{12}&& \text{cancel out the denominators} \\[1 em]4x &= 24&& \text{ divide both sides by $ 4 $ } \\[1 em]x &= \frac{24}{4}&& \\[1 em]x &= 6&& \\[1 em] \end{aligned} $$
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