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The system of linear equations are $\"\"$ .

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(a) The linear equations can be written as matrix form AX = B.

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$\"\"$

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The augmented matrix is formed by adjoining matrix B to matrix A.

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$\"\"$ $\"\"$

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(b) Now we can use Gauss-Jordan elimination

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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The values of $\"\"$ . $\"\"$

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The matrix equation is $\"\"$

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and the values of $\"\"$ .