Solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable.w - x + 2y + z = 2 x + y = 1 y - z = 5
A. {(-12 - 4z, -4 - z, 5 + z, z)}
B. {(-12, -4, 5, z)}
C. {(-16, -5, 6, 1)}
D. ?
Answer: A
Mathematics
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- 
A. 
B. 
C. 
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Mathematics