Find the solution to the system of equations x + 4y - 5z = -8
x + 4y - 4z = -2
x + 5y - 4z = 3

A. x=2 , y=5 , z=6
B. x=3 , y=14 , z=-12
C. x=4 , y=5 , z=6
D. x=2 , y=4, z=5

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?