SOLUTION: a triangle has 2 sides that are the same length and a third side that's 10ft less than twice the shorter sides and the perimeter is 90 ft.write an equation and find the length of e

Algebra ->  Equations -> SOLUTION: a triangle has 2 sides that are the same length and a third side that's 10ft less than twice the shorter sides and the perimeter is 90 ft.write an equation and find the length of e      Log On


   

Question 792008: a triangle has 2 sides that are the same length and a third side that's 10ft less than twice the shorter sides and the perimeter is 90 ft.write an equation and find the length of each side.
Answer by waynest(281) About Me  (Show Source):
You can put this solution on YOUR website!
side 1 and 2 = x
side 3 = 2x - 10
p = s * s * s
90 = x + x + (2x -10)
90 = 4x -10
90 + 10 = 4x -10 + 10
100 = 4x
100/4 = 4x/4
25 = x
check:
90 = 25 + 25 + (2(25) -10)
90 = 50 + 40
90 = 90