x * 25,6 = 128
x = 128 / 25,6 = 5
17,8 * x = 360,05 - 93,05
17,8 * x = 267
x = 267/17,8 = 15
29,5 * ( x + 10,25 ) = 376,125
x + 10,25 = 376,125/29,5
x + 10,25 = 12,75
x = 12,75 - 10,25 = 2,5
748 / ( x - 31,72 ) = 13,6
x - 31,72 = 748 - 13,6
x - 31,72 = 55
x = 55 + 31,72 = 86,72