∠A and ​ ∠B ​ are vertical angles with m∠A=x and m∠B=5x−80 What is m∠A ?

Question

This is a math problem that im doing for school and i need  better explanation.

Answer 1

Vertical angles have equal measurements, so x = 5x-80. You can solve for x and thus you have its number of degrees, applicable to both angles A and B.