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

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


x in (-oo:+oo)

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

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

x^(7/3) = 3

x^(7/3) = 3 // ^ 3

x^7 = 27 // ^ 1/7

x = 27^(1/7)

x = 27^(1/7)

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