1-> O O Consider the accompanying matrix as the augmented matrix of a linear system. State in words the next two elementary row operations that should be performed in the process of solving the system. OA. Replace row 2 by its sum with (Type an integer or a simplified OB. Replace row 4 by its sum with What should be the first elementary row operation performed? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. times row 3. (Type an integer or a simplified fraction.) OC. Scale row 1 by. times row 4. fraction.) (Type an integer or a simplified fraction.) D. Interchange row 3 and row 2. ... 1-5 40-2 0 0 0 2-60 5 0 1 3 4 0 47 9

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