SOLUTION: an isosceles triangle has two sides of equal length. the length of one of the equals sides is 3cm more than 2 times the length of the third side. find the length when the perimet

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Question 1140299: an isosceles triangle has two sides of equal length. the length of one of the equals sides is 3cm more than 2 times the length of the third side. find the length when the perimeter is 21 cm. what is the length of each equal side and what is the length of the 3rd side?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
x, x, and t, the third side

x=2t%2B4
Now you only need work with one variable:
%282t%2B4%29%2B%282t%2B4%29%2Bt=21
Solve for t.