Use Gaussian Elimination to Solve the Linear System by Finding $$\begin{array} { r } x - y + 5 z = - 21 \\5 x + z = - 4 \\x + 2 y + z = - 2\end{array}$$

question 50

Multiple Choice

Use Gaussian elimination to solve the linear system by finding an equivalent system in triangular form.
- $$\begin{array} { r } x - y + 5 z = - 21 \\5 x + z = - 4 \\x + 2 y + z = - 2\end{array}$$

• A) \(( - 4,0,1 )\)
• B) no solution
• C) \(( - 4,1,0 )\)
• D) \(( 0,1 , - 4 )\)

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