Question

Can someone help me with this ?

Answer 1

50

Explanation:

12x + 15 = 5x + 85 {Subtract 15 from both sides}

12x + 15 - 15 = 5x + 85 - 15

12x = 5x + 70 {Subtract 5x from both sides}

12x - 5x = 70

7x = 70 {Divide both sides by 7}

x = 70/7

x = 10

∠U = 5x = 5*10 = 50