SOLUTION: in an isosceles triangle the two sides are equal. the third side is two less than twice the length of the sum of the two sides. the perimeter is 40 what are the lengths of the thre

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Question 889824: in an isosceles triangle the two sides are equal. the third side is two less than twice the length of the sum of the two sides. the perimeter is 40 what are the lengths of the three sides?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
s for length of either equal side
b for the unequal side

b=-2%2B2%28s%2Bs%29 and 2s%2Bb=40.
You have enough to solve this.

b=2%2A2s-2
b=4s-2
-
Substitute.
2s%2B4s-2=40
6s-2=40
6s=42
s=7---one part
-
b=4%2A7-2
b=28-2
b=26---other part