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Perform one step of row reduction, in order to calculate the values for x and y by back substitution. Then calculate the values for

Perform one step of row reduction, in order to calculate the values for x and y by back substitution. Then calculate the values for x and y. Also calculate the determinant of the original matrix. (Note: since the determinant is unchanged by type 3 row operations, it will be easier to calculate the determinant of the row reduced matrix.) -19 12 12 30-0

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