SOLUTION: Please help with this question: an angle measures 90° less than that of a supplementary angle. What is the measurement of each angle?

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Question 892044: Please help with this question:
an angle measures 90° less than that of a supplementary angle. What is the measurement of each angle?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A=S-90
.
.
By definition,
A%2BS=180
.
.
Substitute,
S-90%2BS=180
2S=270
S=135
Then,
A=135-90
A=45