[hp50g] is it possible to solve linear systems with unknown variables in it?

[Marco Polo]

(10-14-2022 05:21 PM)felipeek Wrote:  Thanks Gjermund and Marco for the responses.

@Marco: could you give an example of how can I input an unknown variable in LINSYS command? The way I usually input a linear system is via "NUM.SLV -> Solve lin sys..." and then inputing the matrix there. However, when I try to input an undefined variable, I receive an error. What would be the correct way to do it?

Thanks!

I am not sure about what you are trying to do.
If you refer to the system in the first message, you cannot solve it numerically but you need to use LINSOLVE, which is a CAS command and can be reached via S.SOLV (White Shift + 7).
To input a variable or an expression in a matrix using Matrix Writer you shall use the symbol ', i.e. 'X'