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m in (-oo:+oo)
m/(-3.25) = -8 // + 8
m/(-3.25)+8 = 0
8-0.30769231*m = 0 // - 8
-0.30769231*m = -8 // : -0.30769231
m = -8/(-0.30769231)
m = 25.99999981
m = 25.99999981
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