570 * x - 4700 = 13540 + 300
570 * x - 4700 = 13840
570 * x = 13840 + 4700
570 * x = 18540
x = 18540 / 570
x = 32 20/57
570 * x - 4700 = 13540 + 300
570 * x - 4700 = 13840
570 * x = 13840 + 4700
570 * x = 18540
x = 18540 / 570
x = 32 20/57