math (algerba 1) Please help!

x+y=0

3x+y=-4

Sovle each system of equation by graphing.

If got the answer (-3,3), but it's not there.

Please explain!

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  1. by graphing. Plot the following lines
    y=-x
    y=-3x-4
    where they cross is the solution. It is not -3,3

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