$$\frac{y}{7}-1 = 8$$
Answer
$$ y = 63 $$
Explanation
$$ \begin{aligned} \frac{y}{7}-1 &= 8&& \text{multiply ALL terms by } \color{blue}{ 7 }. \\[1 em]7 \cdot \frac{y}{7}-7\cdot1 &= 7\cdot8&& \text{cancel out the denominators} \\[1 em]y-7 &= 56&& \text{ move -7 to the right } \\[1 em]y &= 56+7&& \\[1 em]y &= 63&& \\[1 em]y &= 63&& \\[1 em] \end{aligned} $$
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