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(2/3)*x^7 = 17 // - 17
(2/3)*x^7-17 = 0
2/3*x^7 = 17 // : 2/3
x^7 = 51/2
x^7 = 51/2 // ^ 1/7
x = (51/2)^(1/7)
x = (51/2)^(1/7)
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