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{2x−5z+w=−1−x+2y+z−2w=14x−y+5w=−2y−2z−w=0\left\{ \begin{array} { l } 2 x - 5 z + w = - 1 \\- x + 2 y + z - 2 w = 1 \\4 x - y + 5 w = - 2 \\y - 2 z - w = 0\end{array} \right.

Question 180

Multiple Choice

{2x−5z+w=−1−x+2y+z−2w=14x−y+5w=−2y−2z−w=0\left\{ \begin{array} { l } 2 x - 5 z + w = - 1 \\- x + 2 y + z - 2 w = 1 \\4 x - y + 5 w = - 2 \\y - 2 z - w = 0\end{array} \right.


A) x=-2, y=4, z=3, w=-5
B) x=4, y=-2, z=-7, w=-4
C) x=3, y=0, z=-1, w=0
D) x=4, y=-2, z=1, w=-4

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