In the summertime, Rick likes to buy cherries at the farmers market on his first visit of the season. He bought 2 1/4 pound of cherries on his next visit. He bought 3 1/2 pounds of cherries and use a coupon to get seven dollars of purchase he noticed that he was charged to save them out each time which equation can use to find the price of of a pound of cherries. What is the price of a pound of cherries?