Answer
3
Work Step by Step
To simplify, divide both the numerator and denominator by their greatest common factor.
Use the distributive property to find the GCF.
$\frac{3x+9}{x+3}=\frac{3(x+3)}{x+3}=\frac{3(x+3)\div(x+3)}{(x+3)\div(x+3)}=\frac{3}{1}=3$