Question
$$20 = \frac{h}{5}$$
Answer
$$ h = 100 $$
Explanation
$$ \begin{aligned} 20 &= \frac{h}{5}&& \text{multiply ALL terms by } \color{blue}{ 5 }. \\[1 em]5\cdot20 &= 5 \cdot \frac{h}{5}&& \text{cancel out the denominators} \\[1 em]100 &= h&& \text{ swap the left and right side of the equation } \\[1 em]h &= 100&& \\[1 em]h &= 100&& \\[1 em] \end{aligned} $$
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