3x^7/6-21=0 - solution

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Solution for 3x^7/6-21=0 equation:

x in (-oo:+oo)

(3*x^7)/6-21 = 0

1/2*x^7 = 21 // : 1/2

x^7 = 42

x^7 = 42 // ^ 1/7

x = 42^(1/7)

x = 42^(1/7)

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