## Algebra: A Combined Approach (4th Edition)

z = $\frac{25}{2}$
$\frac{4}{5}z$ = 10 Multiply each side by the reciprocal of the coefficient, $\frac{5}{4}$: $\frac{5}{4}(\frac{4}{5}z)$ = 10($\frac{5}{4}$) z = $\frac{25}{2}$