Solve the system. 3x - y = 18 2y + z = 12x + 4z = 31
A. (-7, -3, -6)
B. (z + 18, -z + 12, z)
C. (7, 3, 6)
D. No solution
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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