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For the system of linear equations 2x – y + 3z = 5 3x + 2y – z = 7 4x + 5y +  z =  , Which of the following is NOT correct?

1. The system has infinitely many solution for  = –5 and  = 9
2. The system has infinitely many solution for  = –6 and  = 9
3. The system has inconsistent for  = –5 and  = 8
4. The system has a unique solution for   –5 and  = 8

Correct answer: The system has infinitely many solution for  = –6 and  = 9

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