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19-((18/3)*x^12) = 0
19-6*x^12 = 0
-6*x^12 = -19 // : -6
x^12 = 19/6
x^12 = 19/6 // ^ 1/12
abs(x) = (19/6)^(1/12)
x = (19/6)^(1/12) or x = -(19/6)^(1/12)
x in { (19/6)^(1/12), -(19/6)^(1/12) }
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