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3x+2y=11
7x-y=3
systems of linear equations 

Sagot :

Lilithidn
[tex]\begin{cases}3x+2y=11 \\ 7x-y=3 \end{cases}\\ \\\begin{cases}3x+2*(7x-3)=11 \\ y=7x- 3 \end{cases}\\ \\\begin{cases}3x+14x-6=11 \\ y=7x- 3 \end{cases}\\ \\\begin{cases}17x =11+6 \\ y=7x- 3 \end{cases}[/tex]

[tex]\begin{cases}17x =17 \ \ /:17 \\ y=7x- 3 \end{cases}\\ \\\begin{cases}x=1\\ y=7*1- 3 \end{cases}\\ \\\begin{cases}x=1 \\ y=4\end{cases}[/tex]
 

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