ASAP someone help me and explain to me step by step plz

Show me all the steps

A and B are alternate exterior angles, so they are congruent to each other

this means the equations will be equal to each other

5x+20 = 3x+60
-20 -20
5x = 3x+ 40
-3x -3x
2x= 40

2x/2= 40/2
x= 20

the answer is x=20

then check your work:

5 (20) + 20= 120

3 (20) + 60= 120

they are equal to each other so the answer 20 is correct

Istg idk..if there all the same length there all the same number but use google