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2y+7x=-5 5y-7x=12

2y + 7x = - 5 \: \: \\ 5y - 7x = 12

User Benamar
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2 Answers

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Answer: x = -1 y = 1

User Naho
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3 votes


\begin{cases}2y + 7x = - 5\\5y - 7x = 12\end{cases}

+______________


7y=7\ /:7



y=1



\begin{cases}2y + 7x = - 5\\ y=1\end{cases}



\begin{cases}2 \cdot 1 + 7x = - 5\\ y=1\end{cases}



\begin{cases}2 + 7x = - 5\\ y=1\end{cases}



\begin{cases} 7x = - 5-2\\ y=1\end{cases}



\begin{cases}7x = - 7\ /:7\\ y=1\end{cases}



\begin{cases}x = - 1\\ y=1\end{cases}

User Ryan Skarin
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