A resturant charges $7for a regular meal and $5 for a child's meal. Both prices include tax. A family of nine people spent $53 at the resturant. How many regular meals and how many children's meals did they pay? Use the 4-step process: let statement,equation,solution, and sentence.

x- regular meal

y-childrens meal

7x + 5y = 53

x+y = 9

x = 9-y

7(9-y) +5y = 53

63 - 7y +5y = 53

2y = 10

y = 5

x = 9-5 = 4