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m in (-oo:+oo)
(5/17)*m = 25/221 // - 25/221
(5/17)*m-(25/221) = 0
(5/17)*m-25/221 = 0
5/17*m-25/221 = 0 // + 25/221
5/17*m = 25/221 // : 5/17
m = 25/221/5/17
m = 5/13
m = 5/13
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