SOLUTION: The measure of an angle is 20 less than 3 times its supplement. Find the measure of the angle

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Question 342561: The measure of an angle is 20 less than 3 times its supplement. Find the measure of the angle
Answer by Fombitz(32388) About Me  (Show Source):
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A%2BS=180
.
.
A=3S-20
Substitute,
3S-20%2BS=180
4S-20=180
4S=200
highlight%28S=50%29degrees
.
.
.
A=3%2850%29-20
A=150-20
highlight%28A=130%29degrees