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3*x+7/12 = x+7/11 // - x+7/11
3*x-x+7/12-(7/11) = 0
3*x-x+7/12-7/11 = 0
2*x-7/132 = 0 // + 7/132
2*x = 7/132 // : 2
x = 7/132/2
x = 7/264
x = 7/264
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