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3^4*x-3 = 1/81 // - 1/81
3^4*x-(1/81)-3 = 0
3^4*x-1/81-3 = 0
81*x-244/81 = 0 // + 244/81
81*x = 244/81 // : 81
x = 244/81/81
x = 244/6561
x = 244/6561
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