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27-((3*x^6)/2) = 0
(-3/2)*x^6+27 = 0
-3/2*x^6 = -27 // : -3/2
x^6 = 18
x^6 = 18 // ^ 1/6
abs(x) = 18^(1/6)
x = 18^(1/6) or x = -18^(1/6)
x in { 18^(1/6), -18^(1/6) }
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