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m in (-oo:+oo)
8-2*m = 47/6 // - 47/6
8-2*m-(47/6) = 0
8-2*m-47/6 = 0
1/6-2*m = 0 // - 1/6
-2*m = -1/6 // : -2
m = -1/6/(-2)
m = 1/12
m = 1/12
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