How to find where two lines interesect on a graphing calculator?

On the TI-83 
put one equation in Y1 and the other in Y2
press graph (look for an intersection to appear in this window)
    if you see it proceed to press 2nd trace 5 enter enter enter answer will be at 
    the bottom of the screen X=            Y=

    if you don't see it adjust you window by pressing the window key change
    Xmin, Xmax, Ymin, Ymax to get a bigger window...graph (do you see an 
    intersection?) press 2nd trace 5 enter enter enter

be sure to check slopes if they are equal no solution will be found between the two lines