Texas Instruments TI-83 PLUS - Manual (Page 259)

TI-83 Plus Matrices 256
Chapter 10:
Matrices
Getting Started: Systems of Linear
Equations
Getting Started is a fast-paced introduction. Read the chapter for details.
Find the solution of X + 2Y + 3Z = 3 and 2X + 3Y + 4Z = 3. On the TI-83 Plus , you
can solve a system of linear equations by entering the coefficients as elements in
a matrix, and then using
rref( to obtain the reduced row-echelon form.
1. Press y
>
. Press ~ ~ to display the
MATRX EDIT
menu. Press 1 to select 1: [A] ¸
2. Press 2
Н
4
Н to define a 2×4 matrix.
The rectangular cursor indicates the current
element. Ellipses (
... ) indicate additional
columns beyond the screen.
3. Press 1
Í to enter the first element. The
rectangular cursor moves to the second column
of the first row.