SOLUTION: Two sides of a triangle have the same length. The third side measures 3 m less than twice that length. The perimeter of the triangle is 13 m. Find the lengths of the three sides.

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Question 986613: Two sides of a triangle have the same length. The third side measures 3 m less than twice that length. The perimeter of the triangle is 13 m. Find the lengths of the three sides.
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Hi there,
Two sides that are the same
length = 2x m
Third side = 2x - 3
Perimeter is the measure of
all the three sides.
Perimeter = 2x + (2x - 3)
13 m = 2x + 2x - 3
collect like terms
4x = 16 m
x = 4 m
Two sides = 4 m apiece.
Third side = 5 m
Hope this helps :-)