Use Matrices to Solve the System of Equations $\left\{ \begin{array} { l } x + y + z = 6 \\x + 3 y + z = 8 \\x + y + 3 z = 12\end{array} \right.$

question 233

Multiple Choice

Use matrices to solve the system of equations. $\left\{ \begin{array} { l } x + y + z = 6 \\x + 3 y + z = 8 \\x + y + 3 z = 12\end{array} \right.$

• A) \(( 1,2,3 )\)
• B) \(( - 2 , - 1 , - 3 )\)
• C) \(( 2,1,3 )\)
• D) no solution
• E) infinitely many solutions

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