Question

Solve the system of equations by the Gauss-Jordan method.

1 1 1 | -8
1 2 2 | -17
1 3 2 | -22

Answer 1

R2=R2-R1
R3=R3-R1
R3=R3-2R2
R3=-R3
R1=R1-R2
R2=R2-R3

Now you should be in reduced echelon form with solutions:
x1=1,x2=-5,x3=-4