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(3*x+4)/8 = 4 // - 4
(3*x+4)/8-4 = 0
(3*x+4)/8+(-4*8)/8 = 0
3*x-4*8+4 = 0
3*x-28 = 0
(3*x-28)/8 = 0
(3*x-28)/8 = 0 // * 8
3*x-28 = 0
3*x-28 = 0 // + 28
3*x = 28 // : 3
x = 28/3
x = 28/3
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