Answer:
x = 18
< A = 166
Explanation:
Angles A and B are corresponding angles, therefore they have the same measure. Using this information, you get the following equation:
7x + 40 = 3x + 112
-3x - 3x
4x + 40 = 112
- 40 - 40
4x = 72
Divide both sides by 4.
x = 18
Solve for A:
7(18) + 40 = 166
Hope it helps!