Use the method of Gauss-Jordan elimination (trails–forming (lie augmented matrix into reduced echelon form) to solve Problem in Section 3.2.
In Problems, use elementary row operations to transform each augmented coefficient matrix to echelon form. Then solve the system by back substitution.
2x1 + 4x2 − x3 − 2x4 + 2x5 = 6
x1 + 3x2 + 2x3 − 7x4 + 3x5 = 9
5x1 + 8x2 − 7x3 + 6x4 + x5 = 4
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