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m in (-oo:+oo)
m/(-4) = -2.27 // + 2.27
m/(-4)+2.27 = 0
2.27-1/4*m = 0 // - 2.27
-1/4*m = -2.27 // : -1/4
m = -2.27/(-1/4)
m = 9.08
m = 9.08
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