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(2*x^3)/2 = 54 // - 54
(2*x^3)/2-54 = 0
1*x^3 = 54 // : 1
x^3 = 54
x^3 = 54 // ^ 1/3
x = 3*2^(1/3)
x = 3*2^(1/3)
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