Question

what value of k the equation 3x-y+8=0 and 6x-ky=-16​

Answer 1

Answer:

-2

Step-by-step explanation:

6x-ky=-16

6x-2y=-16

-ky+2y=0

-ky=2y

so k=-2

Answer 2

Answer:

k=2

Step-by-step explanation:

$3x - y + 8 = 0 \\ = > 3x - y = - 8$

$6x - ky = - 16 \\ dividing \: the \: above \: equation \: by \: 2 \\ = > \frac{6x}{2} - \frac{ky}{2} = \frac{ - 16}{2} \\ = > \frac{6x - ky}{2} = - 8 \\ by \: keeping \: the \: value \: - 8 \\ = > \frac{6x - ky}{2} = 3x - y \\ = > 6x - ky = 6x - 2y \\ = > - k = \frac{ - 2y}{y} \\ = > - k = - 2 = > k = 2$