Question

The side of an equilateral triangle is 3 inches shorter than the side of a square. The perimeter of the square is 37 inches more than the perimeter of the triangle. Find the length of a side of the square.

Answer 1

let x = triangle side
y = square side
x = y -3

4y = 37 + 3x
4y = 37 + 3(y - 3)
4y = 37 + 3y - 9
y = 28