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k in (-oo:+oo)
k/(-1.2) = 0.07 // - 0.07
k/(-1.2)-0.07 = 0
-0.83333333*k-0.07 = 0 // + 0.07
-0.83333333*k = 0.07 // : -0.83333333
k = 0.07/(-0.83333333)
k = -0.084
k = -0.084
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