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27^3*x-1 = (9*3^1)/2 // - (9*3^1)/2
27^3*x-((9*3^1)/2)-1 = 0
27^3*x-27/2-1 = 0
19683*x-29/2 = 0 // + 29/2
19683*x = 29/2 // : 19683
x = 29/2/19683
x = 29/39366
x = 29/39366
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