Solve the System,if Possible $$\left\{ \begin{array} { l } x + y = - 9 \\y + z = - 15 \\2 x - z = 7\end{array} \right.$$

question 10

Multiple Choice

Solve the system,if possible. ?? $$\left\{ \begin{array} { l } x + y = - 9 \\y + z = - 15 \\2 x - z = 7\end{array} \right.$$ ?

• A)x = -9,y = 12,z = 5
• B)x = 1,y = -10,z = -5
• C)x = -1,y = 10,z = 5
• D)x = -9,y = 1,z = 5
• E)no solution;inconsistent system

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