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(x^3)/2 = 100 // - 100
(x^3)/2-100 = 0
1/2*x^3 = 100 // : 1/2
x^3 = 200
x^3 = 200 // ^ 1/3
x = 2*25^(1/3)
x = 2*25^(1/3)
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