Texas Instruments TITANIUM TI-89 - Manual (Page 262)

Symbolic Manipulation 262
Note: The simult and rref matrix functions are not on the „
Algebra menu. Use
2 I
4 or the Catalog .
Use the simult function with a
matrix. Enter the coefficients as a matrix and
the results as a constant column
matrix.
Use the rref function with a matrix. Enter the coefficients as an
augmented matrix.
Method Example