Question
$$\frac{25}{75} = \frac{2500}{x}$$
Answer
$$ x = 7500 $$
Explanation
$$ \begin{aligned} \frac{25}{75} &= \frac{2500}{x}&& \text{multiply ALL terms by } \color{blue}{ 75x }. \\[1 em]75x\cdot\frac{25}{75} &= 75x\cdot\frac{2500}{x}&& \text{cancel out the denominators} \\[1 em]25x &= 187500&& \text{ divide both sides by $ 25 $ } \\[1 em]x &= \frac{187500}{25}&& \\[1 em]x &= 7500&& \\[1 em] \end{aligned} $$
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