Add the equations to find the solutions to the system. 4x - y = 8

6x + y = 2

A) (2, -4)

B) (-4, 1)

C) (1, -4)

D) (-2, -1)

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?