Forward substitution, MATLAB in Engineering

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Forward substitution:

The Forward substitution (done methodically by first getting a 0 in the a21 place, and then a31, and lastly a32):

1873_Forward substitution.png

For the Gauss technique, this is followed by the back-substitution:

938_Forward substitution1.png

For the Gauss-Jordan technique, this is rather followed by the back elimination:

1384_Forward substitution2.png

13_Forward substitution3.png

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