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W in (-oo:+oo)
W/(-1.3) = -6.2 // + 6.2
W/(-1.3)+6.2 = 0
6.2-0.76923077*W = 0 // - 6.2
-0.76923077*W = -6.2 // : -0.76923077
W = -6.2/(-0.76923077)
W = 8.05999999
W = 8.05999999
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