Write the system of equations associated with the augmented matrix. Do not solve.
A. 7x - 2y - 4z = 9
9x + 3y = 4
-7x - 8z = 7
B. 7x - 2y - 4z = 9
9x + 3y = 4
-7x - 8y = 7
C. 7x - 2y - 4z = 9
9x + 3z = 4
-7x - 8y = 7
D. 7x - 2y - 4z = 9
9x + 3y + 4z = 0
-7x - 8y + 7z = 0
Answer: A
Mathematics
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