1. There are two vertical angles. One angle is represented by 15x and the other angle

7x + 40. What is the value of x?

2. There are three supplementary angles. The first angle is 5x – 5, the second angle is

2x, and the third angle is 8x – 10. Find x.

3. There are two complementary angles. The first angle is 6x + 20 and the second angle

is 4x + 10. Find x.