Use Gauss-Jordan method (augmented matrix method) to solve the following systems of linear equations. Indicate whether the system has a unique solution, infinitely many solutions, or no solution. Clearly write the row operations you use. (a) (5 points) x + y + z = 6 2x − y − z = 3 x + 2y + 2z = 0 (b) (5 points) x − 2y + z = 4 3x − 5y + 3z = 13 3y − 3z = −9
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