Posted by Nita on Saturday, September 22, 2007 at 7:18pm.
The perimeter of an equilateral triangle is 7 inches more than the perimeter of a square,and the side of the triangle is 5 inches longer than the side of square.Find the side of the triangle.

prealgebra  drwls, Saturday, September 22, 2007 at 7:31pm
Let triangle side length be T and square side length be S.
3T = 4S + 7
T = S + 5
4T = 4S + 20
Subtract the first equation from the last to get T