Realiza la siguiente operación α = 3 (Media - mediana / desviación estándar). si se sabe que μ =2.7 , Me= 5 y σ = 3.94

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?