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h in (-oo:+oo)
h/(-1.05) = 0.85 // - 0.85
h/(-1.05)-0.85 = 0
-0.95238095*h-0.85 = 0 // + 0.85
-0.95238095*h = 0.85 // : -0.95238095
h = 0.85/(-0.95238095)
h = -0.8925
h = -0.8925
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