The price of 1 shirt is x and 5 shirts is 5x but she pays for only 3 of them. You would divide 5 by 3 giving you 3/5 which would be the cost of all the shirts
You have to use the equation which has just slipped my mind. It say x1-y1 over x2-y2. Then you will find x. I am so sorry this equation name slipped my mind. If I remember I will let you know.
