Question
$$10 = \frac{\frac{x}{2}}{5}$$
Answer
$$ x = 100 $$
Explanation
$$ \begin{aligned} 10 &= \frac{\frac{x}{2}}{5}&& \text{multiply ALL terms by } \color{blue}{ 10 }. \\[1 em]10\cdot10 &= 10 \cdot \frac{\frac{x}{2}}{5}&& \text{cancel out the denominators} \\[1 em]100 &= x&& \text{ swap the left and right side of the equation } \\[1 em]x &= 100&& \\[1 em]x &= 100&& \\[1 em] \end{aligned} $$
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