SOLUTION: the two congruent angles of an isoseles triangle measure (2x-20)degrees each. The third angle measures x degrees. What is the measure of each angle?

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Question 222579: the two congruent angles of an isoseles triangle measure (2x-20)degrees each. The third angle measures x degrees. What is the measure of each angle?
Found 2 solutions by rfer, checkley77:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
(2x-20)+(2x-20)+x=180
2x-20+2x-20+x=180
5x=220
x=44 degrees
2x-20=68 degrees

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
2(2x-20)+x=180
4x-40+x=180
5x=180+40
5x=220
x=220/5
x=44 degrees for the third angle.
2*44-20=88-20=68 degrees for the two concruent angles.
Proof:
2*68=44=180
136+44=180
180=180