SOLUTION: The measure of an angle is 40º less than the measure of its supplement. What is the measure of the angle and of its supplement?

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Question 318762: The measure of an angle is 40º less than the measure of its supplement. What is the measure of the angle and of its supplement?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.A%2BS=180
2.A=S-40
Substitute eq. 2 into eq. 1,
%28S-40%29%2BS=180
2S-40=180
2S=220
highlight%28S=110%29 degrees
Then from eq. 2,
A=110-40
highlight%28A=70%29 degrees