Question 511829
Your setup is 100% CORRECT:)
However you did wrong right here:
180 - x = 220 - 2x
2x - x = 220 - 180
x = 40 is what you needed.
Check:

180 - 40 = 2(90 - 40) + 40
140 = 2(50) + 40
140 = 100 + 40
140 = 140 (checked)
John10:)