And so what that means is in equation five, we can leave as it is what's up with this marker? One moment. Okay, so based on six, what that means is we can leave this S as it is because initially at the beginning, the total concentration of S as total is equal to the concentration of S that is not bound to the enzyme because this quantity is very, very small. Now, let's move on to equation seven. So by the same analogy, we see that the total enzyme inside our mixture is equal to the enzyme that is not bound to the substrate plus the enzyme that is bound to the substrate. Now, the same thing essentially what we assumed just a moment ago, we cannot assume for the enzyme case.