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(3*x^3)/4 = 375 // - 375
(3*x^3)/4-375 = 0
3/4*x^3 = 375 // : 3/4
x^3 = 500
x^3 = 500 // ^ 1/3
x = 5*4^(1/3)
x = 5*4^(1/3)
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