Back substitution is required in the following method (s) in the solution of linear simultaneous equation:

Back substitution is required in the following method (s) in the solut

1.	Back substitution is required in the following method (s) in the solution of linear simultaneous equation:
A.	Gauss-Elimination method
B.	Gauss-Jordan method
C.	Iterative method
D.	All of the above
Answer» B. Gauss-Jordan method