$\left\{ \begin{array} { c } x + y + z = 7 \\x - y + 2 z = 7 \\5 x + y + z = 11\end{array} \right.$

question 58

Multiple Choice

$\left\{ \begin{array} { c } x + y + z = 7 \\x - y + 2 z = 7 \\5 x + y + z = 11\end{array} \right.$

• A) x=1, y=4, z=2
• B) x=4, y=1, z=2
• C) x=4, y=2, z=1
• D) x=1, y=2, z=4

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