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9^6*x-6 = 1/6561 // - 1/6561
9^6*x-(1/6561)-6 = 0
9^6*x-1/6561-6 = 0
531441*x-39367/6561 = 0 // + 39367/6561
531441*x = 39367/6561 // : 531441
x = 39367/6561/531441
x = 39367/3486784401
x = 39367/3486784401
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