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k in (-oo:+oo)
-(4*k)-6 = 2-3*k // - 2-3*k
-(4*k)-(-3*k)-6-2 = 0
3*k-4*k-6-2 = 0
-k-8 = 0 // + 8
-k = 8 // * -1
k = -8
k = -8
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