Question

Can some one please give me a step by step solution please. ASAP! I want to know how to learn it.

Answer 1

Vertical angles are congruent.
10x+60=30x-20
20x=80
x=4

All four angles add up to 360 degrees.
360-100-100=360-200=160
160/2=80

100, 100, 80, 80