Question
$$\frac{y}{2}-12 = 18$$
Answer
$$ y = 60 $$
Explanation
$$ \begin{aligned} \frac{y}{2}-12 &= 18&& \text{multiply ALL terms by } \color{blue}{ 2 }. \\[1 em]2 \cdot \frac{y}{2}-2\cdot12 &= 2\cdot18&& \text{cancel out the denominators} \\[1 em]y-24 &= 36&& \text{ move -24 to the right } \\[1 em]y &= 36+24&& \\[1 em]y &= 60&& \\[1 em]y &= 60&& \\[1 em] \end{aligned} $$
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