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

[felipeek]

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!