Solve the system. Express the solution in the form (x, y, z, w). 2y + w = -5 x + y + 6z - w = 11 2x + z + 6w = 7 x + y + 3z = 7
A. {(12, -4, 3, -2)}
B. {(6, -4, 2, -2)}
C. {(6, -2, 3, -1)}
D. {(6, -2, 1, -1)}
Answer: D
Mathematics
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