Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists.x + 3y + 2z=114y + 9z=-12x + 7y + 11z=- 1
A. {(
+ 20, 
+ 3, z)}
B. {(
+ 20, - 
- 3, z)}
C. {(- 
+ 20, - 
+ 3, z)}
D. {(
+ 20, - 
+ 3, z)}
Answer: B
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