Question: Solve this system of linear equations by elimination: [ left{begin{array}{l} 2 x+y=7 x-2 y=6 end{array} ight. ]

Solve this system of linear equations by elimination:
\[ \left\{\begin{array}{l} 2 x+y=7 \\ x-2 y=6 \end{array}\right. \]

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