48G: Solving Equations Message #5 Posted by Vieira, Luiz C (Brazil) on 15 Nov 2001, 7:09 a.m., in response to message #4 by Bill
Hello;
when you mean execute an equation, I understand you want to evaluate it for some values of any of the variables involved; am I right?
If so, the direct way is the one you mentioned:
-Rihgt-shift Solve, opening the SOLVE application form -Solve Equation, showing the equation menu -Choose, to select the highlighted equation.
From there on, the variables in the selected equation will be at the menu labels (softkeys). Anyway, when Solve Equation is pressed, ONLY algebraic (and programs) at the working directory will be shown. If you have other algebraic stored in other directories, they will not be visible at this point.
There is another way, available in the 48S/SX family, that still exists in the G series. In the VAR menu, you should see the name of the variable where your equation is stored. Press Right-shift and the softkey with this name(a shortcut for varname RCL). A copy of the equation will be placed in level 1. Store this copy in a variable named EQ (if existing, should be overwriten). Now, Left-shift SOLVE, ROOT, SOLVR. A different display will lead ou through another exploring environment. Have a look at page 18-7 in the HP48G User's Guide. There are some interesting manouvers explained there about the SOLVR, as an alternative solving environment.
If you want direct evaluation of one side given the other side's variables values, EVAL is faster.
Hope this is about what you are looking for.
Cheers.
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