SOLUTION: The side of a triangle with 3 equal sides is 4 inches shorter than the side of a square. The perimeter of the square is 42 inches more than the perimeter of the triangle. Find the

Algebra ->  Points-lines-and-rays -> SOLUTION: The side of a triangle with 3 equal sides is 4 inches shorter than the side of a square. The perimeter of the square is 42 inches more than the perimeter of the triangle. Find the       Log On


   

Question 1121854: The side of a triangle with 3 equal sides is 4 inches shorter than the side of a square. The perimeter of the square is 42 inches more than the perimeter of the triangle. Find the length of a side of the square.

A. 30 inches
B. 29 inches
C. 26 inches
D. 31 inches
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
t, side of equilateral triangle
x, side of square

3t, triangle perimeter
4x, perimeter of the square
-
system%28t=x-4%2C4x=42%2B3t%29


Find length of side of square.
This is, solve for x.

highlight_green%284x=3%28x-4%29%2B42%29----------solve this equation.