If 5k = ak, How to calculate a = ?

If 5k = ak, How to calculate a = ?

@indranil $5k=−ak$
$5k+ak=0$
$(5+a)k=0$
So $5+a=0$ or $k=0$
If $k$ is not equal to $0$ then $a=−5$
If 5k = ak, How to calculate a = ?
@indranil $5k=−ak$
$5k+ak=0$
$(5+a)k=0$
So $5+a=0$ or $k=0$
If $k$ is not equal to $0$ then $a=−5$