Find the Y -Coordinate of the Solution of the System $\left\{ \begin{array} { l } x - y - 2 z = 15 \\3 x + 2 y - z = 20 \\x - y + z = 9\end{array} \right.$

question 229

Multiple Choice

Find the y -coordinate of the solution of the system $\left\{ \begin{array} { l } x - y - 2 z = 15 \\3 x + 2 y - z = 20 \\x - y + z = 9\end{array} \right.$

• A) y=3
• B) y=-3
• C) y=-8
• D) y=-2

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