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x in (-oo:+oo)
(3-(x/3))^6 = 0
(3-1/3*x)^6 = 0
3-1/3*x = 0 // - 3
-1/3*x = -3 // : -1/3
x = -3/(-1/3)
x = 9
x in { 9, 9, 9, 9, 9, 9 }
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