I suggest getting 2 ordered pairs for each equation
your graph should look like this
http://www.wolframalpha.com/input/?i=x%2B2y%3D9+,+2x-4y%3D2
Use graphical method
x+2y=9
2x-4y=2
1 answer
x+2y=9
2x-4y=2
1 answer