If the system 2x - y + 3z = 2 x...

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If the system
2x - y + 3z = 2
x + y + 2z = 2
5x - y + az = b
has infinitely many solutions, then the values of a and b, respectively, are

A. -8 and 6

B. 8 and 6

C. -8 and -6

D. 8 and -6

Answer: Option B

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