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x in (-oo:+oo)
(1/243)^2*x-3 = 9 // - 9
(1/243)^2*x-9-3 = 0
1/59049*x-12 = 0 // + 12
1/59049*x = 12 // : 1/59049
x = 12/1/59049
x = 708588
x = 708588
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