Two equal sides of a triangles are each 5metres less than the twice the third side .if the perimeter of a triangle is 55 m find the length
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Let the 3rd sides be x
Equal sides = 2x-5
Perimeter=2x-5+2x-5+x
=5x-10+55
5x=55+10
5x=65
x=65/5=13
Therefore 3rd side=13m
Equal sides = 2x-5
=(2*13) -5
=26-5
=21m
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