Solve the following system of equations. x+6y+z= 6 (1) -x+7y+z= 7 (2) 2x - y = -1 (3) What is the solution? Select the correct choice below and fill in any answer boxes within your choice. OA. There is one solution, (). (Type exact answers in simplified form.) OB. The system is dependent. OC. There is no solution.

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