Answer:
Step-by-step explanation:
y = 55°
By exterior angle theorem:
y = 25° + 30°
-5x > 25 |change the signs
5x < -25 |divdie both sides by 5
x < -5
5/x = 10/12
10x = 5•12
10x = 60
x = 60/10
x = 6