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6*x-5/6 = 31/6 // - 31/6
6*x-5/6-(31/6) = 0
6*x-5/6-31/6 = 0
6*x-6 = 0 // + 6
6*x = 6 // : 6
x = 6/6
x = 1
x = 1
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