Question: Two elementary row operations have been completed in shifting from the first matrix to the second. Identify the correct notations for the operations. 1

Two elementary row operations have been completed in shifting from the first matrix to the second. Identify the correct notations for the operations. 1 -1 1 8 1 - -1 1 8 -2 6 -42 1 -3 2 -1 3 -6 -99 0 -3 -12 -15

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