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3*x-6 = 1/2 // - 1/2
3*x-(1/2)-6 = 0
3*x-1/2-6 = 0
3*x-13/2 = 0 // + 13/2
3*x = 13/2 // : 3
x = 13/2/3
x = 13/6
x = 13/6
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