The pizza can be made 4 different way
You could have half a cookie, divide it into thirds. (a semi circle cut into thirds)
At approximately 4.5 hours.
15.75x + 70 = 13.25x + 81
15.75x - 13.25x = 81 - 70
2.5x = 11
x = 4.4
found to the nearest tenth 4.5