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If the system of linear equations 2x + 2y + 3z = a 3x – y + 5z = b x – 3y + 2z = c where a, b, c are non zero real numbers, has more than one solution, then :

1. b – c – a = 0
2. a + b + c = 0
3. b – c + a = 0
4. b + c – a = 0

Correct answer: b – c – a = 0

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