Solve the system.
A. x = 4, y = -2, z = 1, w = -4
B. x = -2, y = 4, z = 3, w = -5
C. x = 4, y = -2, z = -7, w = -4
D. x = 3, y = 0, z = -1, w = 0
Answer: A
Mathematics
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