SOLUTION: the supplement of an angle is twenty less than the angle. Find the angle and supplement

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Question 1051249: the supplement of an angle is twenty less than the angle. Find the angle and supplement
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A%2BS=180
S=A-20
Substituting,
A%2BA-20=180
2A=200
A=100
So then,
S=100-20
S=80