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H in (-oo:+oo)
H/(-1.2) = 0.5 // - 0.5
H/(-1.2)-0.5 = 0
-0.83333333*H-0.5 = 0 // + 0.5
-0.83333333*H = 0.5 // : -0.83333333
H = 0.5/(-0.83333333)
H = -0.6
H = -0.6
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