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
So
If