WP34S - f SLV used with user selectable variables

[gomefun2]

Thanks for this information I was wondering how to do MISO solver functions on the WP 34s.

But I had a question. If I wanted to use a single equation with 40 variables, clearly using the inputs as R01, R02... ...R40, would not be ideal. What is the best way to make the calculator ask for named variables?

My guess is something like:
String:"A?"
STO R00
String: "B?"
STO R01
... ETC

I'm not sure how to code this even... because I am new to this calculator, coming from the HP 35s.

This seems as if it would take at least 200 lines of code to program a 40 variable equation (80 lines to store input variables, then 40 lines to recall them, then another 40 lines at least to put the equation in, then 20 (at least) lines for other stuff). Does this calculator only come with 527 lines of memory as the program screen would suggest?

Thanks