The Perimeter of a quilateral triangle

Question

The perimeter of an equilateral triangle is 19 inches more than the perimeter of a square, and the side of the triangle is 8 inches longer than the side of the square. Find the side of the triangle. (Hint: An equilateral triangle has three sides the same length.)
The side of the triangle is
nothing in.

Answer 1

Very bad title, due to funny spelling error.

 

draw the square, with each side labeled x units; its perimeter is 4x.

draw the equilateral triangle, with each side labeled s units; its perimeter is 3s = 19 + 4x.

 

also, s = x + 8.  two equations, two unknowns; YOU CAN SOLVE