Answer
$\frac{4x + 15}{x + 6}$
Work Step by Step
Since the denominators of the two rational expressions are the same, we can just add the numerators, keeping the denominator the same:
$\frac{12 + (4x + 3)}{x + 6}$
Add the numerators:
$\frac{4x + 15}{x + 6}$
This is the simplest form of the expression.
