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Transcript
```Solving systems of 3x3 linear equations using a TI-84 plus and matrices.
Solve the system:
x − 2 y + 3z = 0
3x − y + z = −7
5 y + 4z = 2
Step 1: create a matrix using a
coefficient matrix
Press the Matrix button (2nd MATH) and
arrow right to EDIT
Step 2: Enter the coefficient matrix by
naming the matrix size.
Step 4: Edit the spaces using a 0 for the
third x (since there was no x listed)
Step 5: Go back and create a new matrix
B
Step 6: This matrix should be 3x1 and
have the solution numbers.
Step 7: To use matrix A and B in an
equation, go back to the matrix menu
and select Matrix A
Step 8: Once you select matrix A into
the main screen, take its inverse using ()1. Then multiply by matrix B.
Step 9: Press enter and you should get
the solution to the matrix in x,y,z order.
```