Solve the system. If the system has infinitely many solutions, write the solution set with x arbitrary. 5x - y + z = 8 7x + y + z = 612x + 2z = 14
A. {(x, -x - 1, -6x + 7)}
B. {(x, -x + 1, 6x + 7)}
C. {(x, -x + 1, -6x + 7)}
D. {(x, -x + 1, 6x - 7)}
Answer: A
Mathematics
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