Question 316794
20*30=600 area of the pool.
(20+2x)(30+2x)=1,344
600+60x+40x+100=1,344
4x^2+100x+600-1,344=0
4x^2+100x-744=0
4(x^2+25x-186)=0
4(x-6)(x+31)=0
x-6=0
x=6 width of the path.
Proof:
(20+2*6)(30+2*6)=1,344
32*42=1,344
1,344=1,344