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m in (-oo:+oo)
m+m+9 = 111/11 // - 111/11
m+m-(111/11)+9 = 0
m+m-111/11+9 = 0
2*m-12/11 = 0 // + 12/11
2*m = 12/11 // : 2
m = 12/11/2
m = 6/11
m = 6/11
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