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k in (-oo:+oo)
29/5 = k-((1/5)*(-10*k-4)) // - k-((1/5)*(-10*k-4))
(1/5)*(-10*k-4)-k+29/5 = 0
1/5*(-10*k-4)-k+29/5 = 0
(1/5*5*(-10*k-4))/5+(5*(-k))/5+29/5 = 0
1/5*5*(-10*k-4)+5*(-k)+29 = 0
29-15*k-4 = 0
25-15*k = 0
(25-15*k)/5 = 0
(25-15*k)/5 = 0 // * 5
25-15*k = 0
25-15*k = 0 // - 25
-15*k = -25 // : -15
k = -25/(-15)
k = 5/3
k = 5/3
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