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(1/3)*(3*x-6) = 12 // - 12
(1/3)*(3*x-6)-12 = 0
1/3*(3*x-6)-12 = 0
1/3*(3*x-6)-12 = 0
x-14 = 0
x-14 = 0
x-14 = 0 // + 14
x = 14
x = 14
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