(85-15)/x = 3570/x = 3570 = 35xx = 70/35x = 2
x * 8 = 810 - 908x = 720x = 720/8x = 90
x / (320/4) = 6x / 80 = 6x = 6 * 80x = 480
(85-15)/x = 35
70/x = 35
70 = 35x
x = 70/35
x = 2
x * 8 = 810 - 90
8x = 720
x = 720/8
x = 90
x / (320/4) = 6
x / 80 = 6
x = 6 * 80
x = 480