How do you solve the system by graphing #x+y=4# and #3x-2y=2#?
Solving the system by graphing implies, graph the two lines on the same graph and see at what point the two intersect. The coordinates of the point of intersection is the solution of the system.
In the present case, the lines would intersect at a point whose coordinates would be (2,2). Hence solution is x=2, y=2.