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k in (-oo:+oo)
(3/2)*((-4/3)*k+5/3) = (-2/3)*((5/3)*k+8/3) // - (-2/3)*((5/3)*k+8/3)
(3/2)*((-4/3)*k+5/3)-((-2/3)*((5/3)*k+8/3)) = 0
(3/2)*((-4/3)*k+5/3)+(2/3)*((5/3)*k+8/3) = 0
3/2*(5/3-4/3*k)+2/3*(5/3*k+8/3) = 0
3/2*(5/3-4/3*k)+2/3*(5/3*k+8/3) = 0
77/18-8/9*k = 0
77/18-8/9*k = 0
77/18-8/9*k = 0 // - 77/18
-8/9*k = -77/18 // : -8/9
k = -77/18/(-8/9)
k = 77/16
k = 77/16
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