50g

If you know how to use matrices, you can just "divide" the column 
vector [4 7 19] by the coefficient matrix [3 -2 1 ...].  The matrix 
writer makes it easy to enter matrices.  Download the User's Guide to 
see lots of different ways of solving systems.  (I'm just learning 
myself.) 

Richard in NC 

--- In 50g@yahoogroups.com, "missing_u1905" <missing_u1905@...> wrote:
>
> hi, im having some basic problems, i just bought my 50g but there 
are
> some basic thing i dont know how to do, like solving systems of
> equations of 3 unknowns, like:
>  3a-2b+1c=4
>  a+4b-5c=7
>  5a-6b-9c=19
> 
> for that kind of equations im still using my casio calculator =( , 
so
> i hope you can help me, thanks!
>