A) X=4, Y=-1, Z=5, W=-4
B) X=-1

question 179

Multiple Choice

$\left\{ \begin{array} { l } 2 x + y - 4 z + w = - 17 \\- x + 2 y + z - 2 w = 7 \\4 x - y + 2 z + 4 w = 11 \\x + y - 2 z - w = - 3\end{array} \right.$

• A) x=4, y=-1, z=5, w=-4
• B) x=-1, y=3, z=6, w=1
• C) x=4, y=-2, z=0, w=4
• D) x=-4, y=-5, z=10, w=4

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