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6-2*x = 3*x+81/11 // - 3*x+81/11
6-2*x-(3*x)-(81/11) = 0
6-2*x-3*x-81/11 = 0
-5*x-15/11 = 0 // + 15/11
-5*x = 15/11 // : -5
x = 15/11/(-5)
x = -3/11
x = -3/11
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