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26 = ((27*x)^3)/4-1 // - ((27*x)^3)/4-1
1-(((27*x)^3)/4)+26 = 0
-19683/4*x^3 = -27 // : -19683/4
x^3 = 4/729
x^3 = 4/729 // ^ 1/3
x = (4/729)^(1/3)
x = (4/729)^(1/3)
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