Question 498618
1/2(180 - x) + (90 - x) = 120
90 - 1/2x + 90 - x = 120
60 = 1 1/2x
40 = x
The supplement is 140 degrees,
The complement is 50 degrees.
1/2(140) + 50  - 120.
This does check.
Cleomenius.