Answer:
x = 20
Step-by-step explanation:
Exterior angle theorem
Exterior angle = Interior opposite angle 1 + Interior opposite angle 2
(9x + 16)° = 90 + (5x - 14)°
9x + 16 = 90 + 5x - 14
9x - 5x = 90 - 14 - 16
4x = 90 - 30
4x/4 = 60/4
