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(4*x-8)/3 = 4 // - 4
(4*x-8)/3-4 = 0
(4*x-8)/3+(-4*3)/3 = 0
4*x-4*3-8 = 0
4*x-20 = 0
(4*x-20)/3 = 0
(4*x-20)/3 = 0 // * 3
4*x-20 = 0
4*x-20 = 0 // + 20
4*x = 20 // : 4
x = 20/4
x = 5
x = 5
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