As tia solved the system of equations below, she transformed matrices at different steps during the process.
-a-+2c-7
2a+b+c=2
-3a+2b+3c=7
she noted the following matrices.
1 0 0
0 1 0
0 0 1
0
-1
3
1-16
1
0
0
1 0
1 0 -1
0 1 3
in which order should the matrices be arranged when solving the system from start to finish?
i, iv, iii, 11