$\"\"$

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The system of equations are

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$\"\"$

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Write the equations into matrix form $\"\"$ .

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Where $\"\"$ is coefficient matrix, $\"\"$ is variable matrix and $\"\"$ is constant matrix.

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Solve the equations in Gauss-Jordan method.

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$\"\"$

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Ken and Sari augmented matrix.

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$\"\"$

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The augmented matrix is $\"\"$ .

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$\"\"$

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Apply elementary row operations to obtain a reduce the row-echelon form.

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$\"\"$ are represents first row, second row and third row .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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case (ii)

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The augmented matrix is $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Ken and Sari augmented matrix is not correct.

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$\"\"$

\

Ken and Sari augmented matrix is not correct.