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x in (-oo:+oo)
(11/4)/20 = x/14 // - x/14
(11/4)/20-(x/14) = 0
11/80-1/14*x = 0 // - 11/80
-1/14*x = -11/80 // : -1/14
x = -11/80/(-1/14)
x = 77/40
x = 77/40
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