Write the System of Linear Equations Represented by the Augmented $\left[ \begin{array} { r r r r | r } 1 & 1 & - 1 & 1 & - 6 \\ 0 & 1 & - 4 & 8 & 0 \\ 0 & 0 & 1 & 4 & 13 \\ 0 & 0 & 0 & 1 & - 3 \end{array} \right]$

question 85

Multiple Choice

Write the system of linear equations represented by the augmented matrix. Use x, y, z, and, if necessary, w for the
variables. Then use back-substitution to find the solution.
- $\left[ \begin{array} { r r r r | r } 1 & 1 & - 1 & 1 & - 6 \\ 0 & 1 & - 4 & 8 & 0 \\ 0 & 0 & 1 & 4 & 13 \\ 0 & 0 & 0 & 1 & - 3 \end{array} \right]$

• A) \(\{ ( - 102,124,25 , - 3 ) \}\)
• B) \(\{ ( - 6,0,13 , - 3 ) \}\)
• C) \(\{ ( - 8 , - 5,8 , - 4 ) \}\)
• D) \(\{ ( - 3,25,124 , - 102 ) \}\)

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