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

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Question 347943: The measure of an angle is 20 less than 3 times its supplement. What is the measure of the angle?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
X=3(180-X)-20
X=540-3X-20
X+3X=520
4X=520
X=520/4
X=130 ANS. FOR THE LARGER ANGLE.
PROOF:
130=3(180-130)-20
130=3*50-20
120=150-20
130=130