Use Matrices to Solve the System of Equations $\left\{ \begin{array} { l } 3 x + y - 3 z = 2 \\x - 2 y + 4 z = 9 \\x + y + z = 12\end{array} \right.$

question 78

Multiple Choice

Use matrices to solve the system of equations. $\left\{ \begin{array} { l } 3 x + y - 3 z = 2 \\x - 2 y + 4 z = 9 \\x + y + z = 12\end{array} \right.$

• A) \(( 3,5,4 )\)
• B) \(( 4,6,4 )\)
• C) \(( - 3 , - 5 , - 4 )\)
• D) no solution
• E) infinitely many solutions

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