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8*(x-4)-(x/4) = 5*(30-(3*x)) // - 5*(30-(3*x))
8*(x-4)-(5*(30-(3*x)))-(x/4) = 0
8*(x-4)-5*(30-3*x)-(x/4) = 0
8*(x-4)-5*(30-3*x)-x/4 = 0
(4*8*(x-4))/4+(-5*4*(30-3*x))/4-x/4 = 0
4*8*(x-4)-5*4*(30-3*x)-x = 0
92*x-x-728 = 0
91*x-728 = 0
(91*x-728)/4 = 0
(91*x-728)/4 = 0 // * 4
91*x-728 = 0
91*x-728 = 0 // + 728
91*x = 728 // : 91
x = 728/91
x = 8
x = 8
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