Use Matrices to Solve the System of Equations (If Possible) $$\left\{ \begin{aligned}x - 3 z & = - 7 \\3 x + y - 2 z & = 2 \\2 x + 2 y + z & = 4\end{aligned} \right.$$

question 12

Multiple Choice

Use matrices to solve the system of equations (if possible) .Use Gaussian elimination with back-substitution or Gauss-Jordan elimination.​ $$\left\{ \begin{aligned}x - 3 z & = - 7 \\3 x + y - 2 z & = 2 \\2 x + 2 y + z & = 4\end{aligned} \right.$$ ​

• A)(-5,-5,4)
• B)​(5,-5,-4)
• C)​(-5,-5,-4)
• D)​(5,5,4)
• E)​(5,-5,4)

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