## Precalculus (6th Edition) Blitzer

$21$
Start with given expression: $\frac{7(x-3)}{2x-16},x=9$. Plug in $9$ for $x$. $\frac{7(9-3)}{2(9)-16}$. Simplify for answer: $\frac{7(6)}{18-16}=\frac{42}{2}=21$.