SOLUTION: One side of an isosceles triangle is 12m longer than the other two sides. The perimeter is 84m. How long are the sides of triangle ?

Question 823403: One side of an isosceles triangle is 12m longer than the other two sides. The perimeter is 84m. How long are the sides of triangle ?
Answer by LinnW(1048) (Show Source): You can put this solution on YOUR website!
s = length of same length side
x = the third side
perimeter = 2s + x
x = s + 12 The wording is unclear so we might have x = 2s + 12
Substituting using s + 12 for s
perimeter = 2s + ( s + 12 )
perimeter = 3s + 12
Since perimeter is 84
84 = 3s + 12
Subtract 12 from each side
72 = 3s
Divide each side by 3
24 = s
Since x = s + 12
x = 24 + 12
x = 36
The two same length sides are 24, and the third side is 36.
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