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x in (-oo:+oo)
(16/9)^3 = (3/4)^12*x // - (3/4)^12*x
(16/9)^3-((3/4)^12*x) = 0
4096/729-531441/16777216*x = 0 // - 4096/729
-531441/16777216*x = -4096/729 // : -531441/16777216
x = -4096/729/(-531441/16777216)
x = 68719476736/387420489
x = 68719476736/387420489
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