On page 34 of the March/April issue I used Solver to develop a fairly complete solution to a break-even analysis problem. While working on that solution, I became enthusiastic over the capabilities of Solver, especially over Solver's ability to take an equation and, almost instantly, turn it into a menu-driven application.
However, my enthusiasm waned when I tried to change the order of the items in the menu list. Solver has a mind of its own when it enters the variables of an equation into the variable menu list. To dampen my enthusiasm further, I realized that many problems are such that there were actually two or more equations to contend with.
Fortunately, Solver comes with the L(x,alg) and G(x) functions. They are briefly described in "Solver Functions" on page 29-8 of The HP 95LX Users' Guide. They are not mentioned anywhere else, and I can see why not. It would take a small book to explain what these functions can do.
As a matter of fact, there is a small book that does a good job of showing how to use these two functions. The book is Technical Applications: Step-by-Step Solutions for Your HP--27S or HP--19B Calculator, Hewlett-Packard, 1987, Mfg #00027--90045. I got my copy from EduCALC for about $10 (contact EduCALC at 800-677-7001, or 714-582-2637; Fax: 714-582-1445).