Given the matrices in Problems 32-35, perform elementary row operations to obtain a 1 in the third

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Given the matrices in Problems 32-35, perform elementary row operations to obtain a 1 in the third row, third column without changing the entries in the first two columns.

\([A]=\left[\begin{array}{rrr:r}1 & 0 & 4 & 5 \\ 0 & 1 & -3 & 6 \\ 0 & 0 & 5 & 10\end{array}ight]\)

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