Question

How do you solve this?

Answer 1

Answer: 9^o

Explanation:

(all angles in an isoceles triangle adds up to 180 degrees)
5 x + 15 + 120 = 180
5x = 180 - 120 - 15
5 x = 45

x = 9^o

Answer 2

120+5x+15+5x+15=180

10x=180-120-15-15

x=30°