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n in (-oo:+oo)
(2/7)*n+2/5 = 32/55 // - 32/55
(2/7)*n+2/5-(32/55) = 0
(2/7)*n+2/5-32/55 = 0
2/7*n-2/11 = 0 // + 2/11
2/7*n = 2/11 // : 2/7
n = 2/11/2/7
n = 7/11
n = 7/11
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