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1-x-(4/2) = x-(3*x)+4/6-(9/12) // - x-(3*x)+4/6-(9/12)
3*x-x-x-(4/2)-(4/6)+9/12+1 = 0
3*x-x-x-2/3+9/12-2+1 = 0
x-11/12 = 0 // + 11/12
x = 11/12
x = 11/12
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