Answer
21
Work Step by Step
$\frac{7(x-3)}{2x-16}$ for $x=9$
substitute 9 for each x
$=\frac{7(9-3)}{2(9)-16}$
complete any grouped operations first - remember that the numerator and denominator of a fraction are each considered grouped
$=\frac{7\times6}{18-16}$
within each group, first complete multiplication and division in order left to right, then addition and subtraction left to right
$\frac{42}{2}$
finish with division - fractions mean divide the numerator by the denominator
$=21$
