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m in (-oo:+oo)
m/(-3.4) = 4.7 // - 4.7
m/(-3.4)-4.7 = 0
-0.29411765*m-4.7 = 0 // + 4.7
-0.29411765*m = 4.7 // : -0.29411765
m = 4.7/(-0.29411765)
m = -15.97999984
m = -15.97999984
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