Question
$$\frac{x}{7}-8 = 15$$
Answer
$$ x = 161 $$
Explanation
$$ \begin{aligned} \frac{x}{7}-8 &= 15&& \text{multiply ALL terms by } \color{blue}{ 7 }. \\[1 em]7 \cdot \frac{x}{7}-7\cdot8 &= 7\cdot15&& \text{cancel out the denominators} \\[1 em]x-56 &= 105&& \text{ move -56 to the right } \\[1 em]x &= 105+56&& \\[1 em]x &= 161&& \\[1 em]x &= 161&& \\[1 em] \end{aligned} $$
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