Question
$$\frac{5}{8}\cdot\frac{18}{4} = 0$$
Answer
This equation has no solution.
Explanation
$$ \begin{aligned} \frac{5}{8}\cdot\frac{18}{4} &= 0&& \text{multiply ALL terms by } \color{blue}{ 8 }. \\[1 em]8 \cdot \frac{5}{8}\cdot\frac{18}{4} &= 8\cdot0&& \text{cancel out the denominators} \\[1 em]\frac{45}{2} &= 0&& \\[1 em] \end{aligned} $$
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