math (algerba 1) Please help!
posted by kathryn .
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!

by graphing. Plot the following lines
y=x
y=3x4
where they cross is the solution. It is not 3,3
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