Question

plz tell me how the ans is k=-1​

Answer 1

Answer:

9k= -9

k= -9/9

k= -1

that's bcoz when you take the 9 the other side you can cut it.

Answer 2

This is very easy,

The final equation is: 9+k = -8k

If you swift the k from LHS to RHS it will become:

9 = -9k

And if you divide both the sides by 9 it will become:

1 = -k

Then if you multiple both sides by -1 it becomes your answer i.e.,

-1 = k

or

k = -1

Hope you will understand