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

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

x in (-oo:+oo)

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

7/3*x^7 = 21 // : 7/3

x^7 = 9

x^7 = 9 // ^ 1/7

x = 9^(1/7)

x = 9^(1/7)

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