In step six, I want to consider the fact that energy or charge is concerned, like mass is concerned. And that means I have to whatever amount of electrons lost by one atom or by one side has to be gained by another side. So notice on this side, I have two electrons, on this side, I have five electrons. That means I want to find a factor or a common factor of five and two. And this factor is ten, because two goes into ten five times, and five goes into ten two times. So I basically multiply this whole guy out by five, and I multiply this whole guy out by two, and I get the following.