Write the system of equations associated with the augmented matrix. Do not solve.
A. -4x - 6y = 0
4x - 7y = 0
B. -4x - 6y = 4
-7x + 4y = -9
C. -4x - 6y = 4
4x - 7y = -9
D. -6x - 4y = 4
4x - 7y = -9
Answer: C
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