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n in (-oo:+oo)
(2*n)/5-(3/11) = 51/55 // - 51/55
(2*n)/5-(3/11)-(51/55) = 0
(2*n)/5-3/11-51/55 = 0
2/5*n-6/5 = 0 // + 6/5
2/5*n = 6/5 // : 2/5
n = 6/5/2/5
n = 3
n = 3
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