SOLUTION: One side of a triangle is 5 meters longer than the second side.The third side is four times the length of the second side.If the perimeter of the triangle is 65 meters,how long i

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Let x = the length of the second side
The first side is 5 metres longer, so the first side is x+5
The third side is four times the length of the second, so it is 4x.

Perimeter of a triangle, just add the 3 sides up:

P = (x+5) + x + 4x
65 = 6x + 5
60 = 6x
x = 10

The second side is 10 meters.