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Give an example of the system of linear equations that can be solved by first adding the equations to eliminate one variable.

Give an example of the system of linear equations that can be solved by first adding the equations to eliminate one variable.
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give an example of the system of linear equations that can be solved by first adding the equations to eliminate one variable.

User Louis LC
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\begin{cases}-2x+3y=9 \\ 2x-2y=-6\end{cases}

User Arabinelli
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