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(3*x^22)/n = 72/4 // - 72/4
(3*x^22)/n-(72/4) = 0
(3*x^22)/n-18 = 0
3*n^-1*x^22 = 18 // : 3*n^-1
x^22 = 6*n
x^22 = 6*n // ^ 1/22
abs(x) = 6^(1/22)*n^(1/22)
x = 6^(1/22)*n^(1/22) or x = -(6^(1/22)*n^(1/22))
x in { 6^(1/22)*n^(1/22), -(6^(1/22)*n^(1/22)) }
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