1. Write the augmented matrix for the system. Do not solve.

8x+8y=48

4x - 2y =12

1. Write the system of equations associated with the augmented matrix.

[ 0 , 1 | -7]

1. Use the indicated row operation to change the matrix.
2. Replace R 2 by R2 + (-1) R2

[1 , -3 | 4]

[2 , 3 | 1]

1. Replace by R3 by R3.

[8 0 0 | 6

0 6 0 | 6

0 0 2| 6]