Answer:
x = 12
Step-by-step explanation:
The ray from the vertex to the base is an angle bisector and divides the opposite side into segments that are proportional to the other 2 sides, that is
[tex]\frac{x}{9}[/tex] = [tex]\frac{4}{3}[/tex] ( cross- multiply )
3x = 36 ( divide both sides by 3 )
x = 12
