Solve the system of linear equations.
x - 
y = -18
x + 
y = -9
A. No solutions
B. (12, 0)
C. (0, 12)
D. (-12, 0)
Answer: D
Mathematics
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A. 
+ 
i
B. 
+ 
i
C. 
+ 
i
D. 
- 
i
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