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(75-x)/8 = 1.25 // - 1.25
(75-x)/8-1.25 = 0
(75-x)/8+(-1.25*8)/8 = 0
75-x-1.25*8 = 0
65-x = 0
(65-x)/8 = 0
(65-x)/8 = 0 // * 8
65-x = 0
65-x = 0 // - 65
-x = -65 // * -1
x = 65
x = 65
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