Solve the following system by any appropriate method. If there is no real number solution, so state.xy = 20x + y = -9
A. (-4, 5), (-5, 4)
B. (4, 5), (5, 4)
C. (4, -5), (5, -4)
D. (-4, -5), (-5, -4)
Answer: D
Mathematics
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