HP 39g+ - Manual (Page 180)

12-8 Matrices
Solving systems of linear equations
Example Solve the following linear system:
1. Open the Matrix catalog and choose to create a vector in
the M1 variable.
>6+,)7@
MATRIX I@X•
*e,>(17(5@
2. Create the vector of the constants in the linear system.
5
>(17(5@ 7 >(17(5@
1
>(17(5@
3. Return to the Matrix
catalog. The vector you
created is listed as M1.
>6+,)7@
MATRIX
4. Select the M2 variable and create a new matrix.
*e,
I@X•
Select Real matrix
PF•
5. Create a new matrix and enter the equation coefficients.
2 >(17(5@3>(17(5@
4
>(17(5@*e,
1
>(17(5@1>(17(5@
>  @1 >(17(5@ 4>(17(5@
>  @1>(17(5@2>(17(5@
2x 3y 4z + + 5
x y z – + 7
4x y – 2z + 1
=
=
=