SOLUTION: the two equal side of an isosceles triangle are each 9 cm longer than the other side. if the perimeter of the triangle is 81 cm, what is the length of each side?

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Question 318651: the two equal side of an isosceles triangle are each 9 cm longer than the other side. if the perimeter of the triangle is 81 cm, what is the length of each side?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
2(x+9)+x=81
3x+18=81
3x=63
x=21 cm
2 at x+9=30 cm each