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m in (-oo:+oo)
m-(7*m)-(22/5)-(28/7) = 2 // - 2
m-(7*m)-(22/5)-(28/7)-2 = 0
m-7*m-22/5-4-2 = 0
-6*m-52/5 = 0 // + 52/5
-6*m = 52/5 // : -6
m = 52/5/(-6)
m = -26/15
m = -26/15
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