Jerica, the best way to graph both equations is to get them to look like y = mx + b.
2x + y = 1
-2x -2x
y = -2x + 1
x - y = 2
-x -x
-y = -× + 2
-1 -1
y = x - 2
Hopefully you can graph each of these. Where the meet is your answer!
