Solving Equations through Graphing?

Question

How do you do this equation.

http://www.flickr.com/photos/26179190@N06/2822101118/

Answer 1

There are two variables.

You cannot solve this for both X and Y

hence we can relatively link them like   X = 2Y + 14

So you get a line on a x,Y graph by joining two different values of x and y which you can obtain by giving different values for y