Algebra - Ch. 35: Systems of of Linear Eq. in 3 Variables (11 of 25) Method 5: Augmented Matrix

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We will use method 5: AUGMENTED MATRIX method (REDUCED row-echelon) to solve the system of linear equations in 3 variables:
Eqn. 1: x-y+4z=9
Eqn. 2: 5x+3y-6z=3
Eqn. 3: 3x+7y+4z=-1

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