For what ordered pair $(a,b)$ are there infinite solutions $(x,y)$ to the system \begin{align*}
2ax+2y&=b,\\
5x+y&=-3?
\end{align*}
Question:
For what ordered pair $(a,b)$ are there infinite solutions $(x,y)$ to the system \begin{align*}
2ax+2y&=b,\\
5x+y&=-3?
\end{align*}
Answer:
Let's think step by step.

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(5,-6)
For what ordered pair $(a,b)$ are there infinite solutions $(x,y)$ to the system \begin{align*}
2ax+2y&=b,\\
5x+y&=-3?
\end{align*}
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