HP 95LX - Using the Solver

Using the Solver
If you would like to create a calculation template—similar to the TVM or business
percentage calculations—for some equation of your own choosing, then you need
to learn how to write Solver equations. The equations you write can be as simple
as A+B=C or as complex as those included in this book (see pages 58-62).
Creating and Naming Solver Equations
As an example, create and name an equation for gas mileage.
Press &), (Sklve to open to the current Solve catalog (if any).
Type in the equation: MPG=Miles- Gallons
Press ENTER). You have created the equation. Now name it...
Press (€) to move to the name section in the Solve catalog.
Type in a name, GasMi 1eage and press (ENTER).
Ok
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Using Solver Equations
Your 350-mile trip uses 11.9 gallons. How far can it go on 15 gallons? To find out,
use the GasMi 1 eage equation from above.
1. Make sure that the Solve catalog containing the GasMi 1 eage equation is
being displayed (see page 54 if you have trouble).
2. Highlight the GasMi 1 eage equation (either the name or the equation itself
will work) and press (MEJE®). You will see you customized calculation
template and menu.
3. Enter data into all variables but one: Press (3)5)0), F3) (AFREER), (111-9),
CEI).
4. Solve for the remaining variable: Press (F2) (I5¥). Answer: 29 «41 mpg.
5. Change a variable and solve for a different variable: (1]5)([F4) (EERREEIR), (F3)
(EERE). Answer: 441 . 18 miles.
Using the Solver 53