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k in (-oo:+oo)
(3/5)*k+13 = -24 // + 24
(3/5)*k+13+24 = 0
3/5*k+37 = 0 // - 37
3/5*k = -37 // : 3/5
k = -37/3/5
k = -185/3
k = -185/3
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