Question

I need your help with a question

Answer 1

x = 20

Explanation:

5x + 80 = 180 ==> a straight line has the measure of 180 degrees

5x + 80 - 80 = 180 - 80 ==> subtract 80 on both sides to isolate x

5x = 100

5x/5 = 100/5 ==> divide by 5 on both sides to isolate x

x = 20 ==> simplify