Question 570613
"the side of the triangle is 6 inches longer than the side of the square" ___ t = s + 6 ___ t - 6 = s


"The perimeter of an equilateral triangle is 9 inches more than the perimeter of a square"
___ 3t = 4s + 9


substituting ___ 3t = 4(t - 6) + 9 ___ 3t = 4t - 24 + 9