SOLUTION: How do I solve this question? In an isosceles triangle, the sum of two congruent angles is thirty less than half the other angle. Find the angles.

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Question 598534: How do I solve this question? In an isosceles triangle, the sum of two congruent angles is thirty less than half the other angle. Find the angles.
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = one of the congruent angles, then the third angle is 180-2x..
2x+=+%28%28180-2x%29%2F2%29-30 Simplify.
2x+=+90-x-30
2x+=+60-x Add x to both sides.
3x+=+60 Divide both sides by 3.
x+=+20
180-2x+=+180-40=140
The angles are:
20 degrees, 20 degrees, and 140 degrees.