9514 1404 393
Answer:
125°
Explanation:
Let x represent the angle in degrees. Its supplement is (180-x) degrees. The given relation is ...
x = 15 +2(180-x)
x = 375 -2x . . . . simplify
3x = 375 . . . . . . add 2x
x = 125 . . . . . . . divide by 3
The measure of the angle is 125°.