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m in (-oo:+oo)
6*m-(24/2) = 4*m // - 4*m
6*m-(4*m)-(24/2) = 0
6*m-4*m-12 = 0
2*m-12 = 0 // + 12
2*m = 12 // : 2
m = 12/2
m = 6
m = 6
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