Mathematics
Tmarquez
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solve the linear system by graphing  x-y=2 x+y=-8

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lyssie11234

[latex]\left\{\begin{array}{ccc}x-y=2\\x+y=-8\end{array}\right\\\left\{\begin{array}{ccc}y=x-2\\y=-x-8\end{array}\right\\\\\\y=x-2\\for\ x=0\to y=0-2=-2\to(0;-2)\\for\ x=2\to y=2-2=0\to(2;\ 0)\\\\y=-x-8\\for\ x=-8\to y=-(-8)-8=0\to(-8;\ 0)\\for\ x=0\to y=-0-8=-8\to(0;-8)\\\\\left\{\begin{array}{ccc}x=-3\\y=-5\end{array}\right\\[/latex]

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