Mark used 50% of tickets on rides, 1/3 of tickets on video games and the rest in batting cages. did he use 10% of the tickets in batting cages?

Well if you turn 1/3 of the tickets (Video Games) into a percent then you get 33.33%.Added to the extra 50% (Rides) then you have 83.33%.With the information we have here,Mark infact used 10% of his tickets on batting cages.

6(2x + 5y)6 (2x) = 12x6 (5y) = 30y12x + 30y