Answer:
x = 8°
Explanation:
The angle that say 60° and the angle that says 8x -4 ARE BOTH EQUAL. 
They are called Alternate Interior Angles 
Let's write an equation to represent this relationship, then we solve it to find x 
8x - 4 = 60 
SOLVE 
8x = 60 + 4 
8x = 64 
x = 64 / 8 
x = 8 °