What is Gaussian Elimination with backward substitutions?

1. What is Gaussian Elimination with backward substitutions?

Explain your answer by solving this problem using the following equations:

x + y = 3

3x -4y = 2

2.  After explaining the Gaussian elimination, use MATLAB to solve the same  problem above by creating matrix A and B from the equations:

x = inv(A) * B

or

x = A\B

Copy and paste in the edit window to SHOW ALL YOUR Work.

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