So the breaking is equal to the forming. And so that's exactly what we do in this step. We essentially equate this equation to this equation here. So we have K one multiplied by these two concentrations is equal to K minus one multiplied by Es plus K two multiplied by Es. Notice on the right side we have these two same terms and we can bring that out of our equation to get the following result. And now we can basically bring all the concentrations to the left side and all the K values, the rate constants to the right side and we get this equation.