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John was writing equations to represent the following matrix:
\(\left[ \begin{array}{ccc} 1 & -2 & 0 \\ 2 & -7 & 3 \\ 1 & 6 & 1 \end{array} \ \ \ \ \right]\bullet \left[ \begin{array}{c} x \\ y \\ z \end{array} \right]=\left[ \begin{array}{c} 3 \\ -1 \\ 5 \end{array} \right]\)
He wrote these 3 equations. What is wrong with the equations he wrote? What are the correct equations?
\(\left\{ \begin{array}{c} x+2y+z=3 \\ -2x-7y+6z=-1 \\ 3y+z=5 \end{array} \right.\)
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