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n in (-oo:+oo)
(4*n)/5-(7/11) = 53/55 // - 53/55
(4*n)/5-(7/11)-(53/55) = 0
(4*n)/5-7/11-53/55 = 0
4/5*n-8/5 = 0 // + 8/5
4/5*n = 8/5 // : 4/5
n = 8/5/4/5
n = 2
n = 2
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