Respuesta :

We need to find k, so we have that

[tex]\begin{gathered} -4k+2(k-6)=-3k-39_{} \\ -4k+2k-12=-3k-39_{} \\ -4k+2k+3k=-39+12_{} \\ k=-27_{} \end{gathered}[/tex]

So the answer is k=-27.