Quote Originally Posted by Dr.Peterson View Post

For non-algebraic methods, what Denis did is what I would do. But you are probably in a class where you are expected to learn algebra, not general problem-solving skills, as valuable as the latter are.
I am retired, not in any class. I took up algebra to keep my mind active. When I studied this subject in school I didn't have time to give it any real thought. I didn't experiment with it, didn't try to come up with my own solutions...because there was just no time for that. Too much pressure from too many sides. Now I have the time. I have no teacher...but with some help from people on this forum I think I will be OK. I have been hunting around online for the instreuctor's solutions manual for the old algebra book I have (Blitzer, 1994). So far no luck.