5.Solve:

2x + y - z = 0
x - y + z = 6
x + 2y + z = 3

Select the appropriate response
A) x=2 y=-1 z=-3
B) x=-3 y=5 z=2
C) x=2 y=-1 z=3

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?