measure of angle one is equal to measure of angle 3 because of the vertical angle theorem, or something like that, so just make both equations equal t each other, and that should give you the answer.
7x - 24 = 5x + 14
2x = 38
x = 19
m<1 = 7(19) - 24 = 109
m<3 = 5(19) +14 = 109
