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(2*x+4)/2 = 8 // - 8
(2*x+4)/2-8 = 0
(2*x+4)/2+(-8*2)/2 = 0
2*x-8*2+4 = 0
2*x-12 = 0
(2*x-12)/2 = 0
(2*x-12)/2 = 0 // * 2
2*x-12 = 0
2*x-12 = 0 // + 12
2*x = 12 // : 2
x = 12/2
x = 6
x = 6
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