Here's a different way that doesn't solve for the reciprocal.Multiply through by LCD 6·y - p·y·a·x = p·m + p·y·k Get all the terms in y on the left and the term that does not contain y on the other side: 6·y - p·y·a·x - p·y·k = p·m Factor out y on the left: y·(6- p·a·x-p·k) = p·m Divide both sides by (6-p·a·x-p·k) Edwin