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(1/3)*(6*x-12) = 8 // - 8
(1/3)*(6*x-12)-8 = 0
1/3*(6*x-12)-8 = 0
1/3*(6*x-12)-8 = 0
2*x-12 = 0
2*x-12 = 0
2*x-12 = 0 // + 12
2*x = 12 // : 2
x = 12/2
x = 6
x = 6
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