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m in (-oo:+oo)
4*m-(m/6) = 7/12 // - 7/12
4*m-(m/6)-(7/12) = 0
4*m-(m/6)-7/12 = 0
23/6*m-7/12 = 0 // + 7/12
23/6*m = 7/12 // : 23/6
m = 7/12/23/6
m = 7/46
m = 7/46
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