Aprofessional football field is 53 1/3 yards wide. find the ratio of the width of the actual field to the width of the field in the poster as a fraction in simplest form

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?