math
posted by chris on .
the perimeter of a triangle is 79.75 inches. the second side of the triangle is half as big as the first side. the third side is 7.25 in greater than the first side
what is the length of the longest side of the triangle?

Let x = first side, then x/2= second and x+7.25 = third.
x + x/2 + x+7.25 = 79.75
Solve for x, then x+7.25.