What is the width of the concrete border?

Question

the jackson family is planning on installing a rectangular in-ground pool that measures 18 feet by 36 feet, they are going to put a concrete border of uniform width around the pool and fence in the area. Mrs jackson needs to tell the contractor the width of the border, but cant remebr the width, and rembers that they ordered 52 yards of fencing to enclose the entire are

Answer 1

2(18+2x)+2(36+2x)=52*3

36+4x+72+4x=156

8x+108=156

8x=156-108

8x=48

x=48/8

x=6 feet for the width