Question
In the following exercises, solve the systems of equations by substitution.$\left\{\begin{array}{c}x=2 y \\ 4 x-8 y=0\end{array}\right.$
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In the following exercises, solve the systems of equations by substitution. $$ \left\{\begin{array}{l} x=2 y \\ 4 x-8 y=0 \end{array}\right. $$
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