Question
$$\frac{y}{5}-9 = 11$$
Answer
$$ y = 100 $$
Explanation
$$ \begin{aligned} \frac{y}{5}-9 &= 11&& \text{multiply ALL terms by } \color{blue}{ 5 }. \\[1 em]5 \cdot \frac{y}{5}-5\cdot9 &= 5\cdot11&& \text{cancel out the denominators} \\[1 em]y-45 &= 55&& \text{ move -45 to the right } \\[1 em]y &= 55+45&& \\[1 em]y &= 100&& \\[1 em]y &= 100&& \\[1 em] \end{aligned} $$
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