Answer:
41
Step-by-step explanation:
The two angles are vertical angles, so they are the same value.
(4x - 29) = (3x + 12)
+29 +29 Moving terms around to solve the problem
4x - 0 = 3x + 41
-3x -3x Moving terms around to solve the problem
x - 0 = 41
x = 41
