Solve by the method of elimination by addition or subtraction.
- 
= -18
+ 
= -9
A. x = 0, y = -12
B. x = -12, y = 0
C. x = 0, y = 12
D. x = 12, y = 0
Answer: B
Mathematics
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A. 
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+ 
A. 
B. 
C. 
D. 
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