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2*x+7*x-1 = 16/11 // - 16/11
2*x+7*x-(16/11)-1 = 0
2*x+7*x-16/11-1 = 0
9*x-27/11 = 0 // + 27/11
9*x = 27/11 // : 9
x = 27/11/9
x = 3/11
x = 3/11
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