SOLUTION: 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 the square. Find the side

Question 499758: 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 the square. Find the side of the square.
Answer by MRperkins(300) (Show Source): You can put this solution on YOUR website!
Let the Perimeter of the square be P=4s
Then the Perimeter of the triangle is P+7=3(s+5)
Substitute
4s+7=3(s+5)
4s+7=3s+15
s=8
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