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We will learn the ADVANTAGE of method 5: INVERSE MATRIX method to solve the system of linear equations in 3 variables:
Eqn. 1: 2x+y-z=5
Eqn. 2: x+y-z=4
Eqn. 3: -x-2y+3z=-8
if the original 3 equations changes to:
Eqn. 1: 2x+y-z=2
Eqn. 2: x+y-z=0
Eqn. 3: -x-2y+3z=5

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