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3-(((9*x)^3)/4) = 27 // - 27
3-(((9*x)^3)/4)-27 = 0
-729/4*x^3 = 24 // : -729/4
x^3 = -32/243
x^3 = -32/243 // ^ 1/3
x = -(32/243)^(1/3)
x = -(32/243)^(1/3)
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