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m in (-oo:+oo)
5*m+7/9 = 502/9 // - 502/9
5*m+7/9-(502/9) = 0
5*m+7/9-502/9 = 0
5*m-55 = 0 // + 55
5*m = 55 // : 5
m = 55/5
m = 11
m = 11
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