Question
$$\frac{x}{9}-2 = 10$$
Answer
$$ x = 108 $$
Explanation
$$ \begin{aligned} \frac{x}{9}-2 &= 10&& \text{multiply ALL terms by } \color{blue}{ 9 }. \\[1 em]9 \cdot \frac{x}{9}-9\cdot2 &= 9\cdot10&& \text{cancel out the denominators} \\[1 em]x-18 &= 90&& \text{ move -18 to the right } \\[1 em]x &= 90+18&& \\[1 em]x &= 108&& \\[1 em]x &= 108&& \\[1 em] \end{aligned} $$
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