Solve by any method. If there is not one solution to a system, state why.
x + 
y = -1 x - y = -1
A. (3, -1)
B. (-4, -1)
C. (-3, -2)
D. (-4, -2)
Answer: C
Mathematics
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A. - 16,384
B. - 
C. - 20,480
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