Scientific calculators that have formula/equation memory

[Gene]

The 42S solver requires a program something like this... for X+Y=5

LBL AA
MVAR X
MVAR Y
RCL X
RCL Y
+
5
-
RTN

or some such... as I recall - it has been a while. :-) Please excuse me if that's not quite right above.

You have to declare all your variables using the MVAR (memory variable) function then write an RPN expression evaluating the function to = 0.

The MVAR will create the SOLVER menu labels when you enter the solver and choose AA as the program for it. It will then display menu labels for X and Y.

So, doable, but not quite the same.