Solve the System,if Possible $$\left\{ \begin{array} { l l } x + y + z & = - 20 \\2 x + y + z & = - 30 \\5 x + y - z & = - 46\end{array} \right.$$

question 48

Multiple Choice

Solve the system,if possible. ?? $$\left\{ \begin{array} { l l } x + y + z & = - 20 \\2 x + y + z & = - 30 \\5 x + y - z & = - 46\end{array} \right.$$ ?

• A)x = -10,y = -3,z = -7
• B)x = 10,y = 3,z = 7
• C)x = -2,y = -10,z = 7
• D)x = -13,y = -6,z = 7
• E)no solution;inconsistent system

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