## Algebra and Trigonometry 10th Edition

According to the exercise: $\frac{x}{y}=\frac{12.5}{20}=\frac{5}{8}$. Hence if $y=5$, then $x=5\cdot\frac{5}{8}=\frac{25}{8}$. If $y=25$, then $x=25\cdot\frac{5}{8}=\frac{125}{8}$.