Write an equation that contains several variables, and go immediately to solve them

[CharlieF]

(02-27-2021 09:45 AM)ramon_ea1gth Wrote:  I often use the HP 50g solver with MINIT, MITM and MSOLVR, working in a folder...

So do I. Very often. And... that is: working in a 'particular folder'.
And I do it very often. Exaggerating a bit: 'I couldn't live without them'!

By the way: do you know what is the folder (= memory area) in which I do that work? In a sub-sub-folder called "Home .1 .11". I suppose you can already guess why to do all that work in such a particular folder (a sub sub folder of Home). I'll give you the answer (which I'm sure you can guess): I have in the CST menu of that Home sub sub folder, I have a key in it assigned to a program (very simple program, with just two instructions) that… automatically deletes all the variables created in that sub sub-folder of HOME; and so I can make it clear the 'blackboard', to go on to solve the next problem in chemistry or physics. 'I couldn't live without CST menu, MINIT, MITM, MSOLVR, etc.!

(02-27-2021 09:45 AM)ramon_ea1gth Wrote:  My proposal for the HP-Prime would be this:
- Start the Solve app.
- From the Home screen, create the variables you need as app variables with this command: 0▶AVars({"PrXs_011","PreXs_053","PreTAM_034","LOCFm_01"})
- Press the Symb key and enter your equation. Your created variables are also available by pressing [Vars][Solve][Program]
This approach is also useful if you create new apps based on the Solve app, as you can store your variables as local app variables, avoiding clutter in the Home environment with global variables.

Great!!!!, excellent!!!!, fantastic!!!!!! Thank you very much, Ramón!!!

And an absolute novice idea: do you think we could combine, in a single program (in order to get the calculator to do it all while we are sitting on the sofa,
- that AVars command
- with... this one that I just discovered: lname (syntax: lname (Expres)) I am not sure if the command is written lname or LNAME
Its description is this:
- list of variables in the expression
- example: lname (exp (x) * 2sin (y)) returns [x, y]

I've checked for an equation..., and it works too.
Example: LNAME (AB_01= exp (x) * 2/B_37) returns this list [AB_01, x, B_37]

Thank you in advance.