Aman and his three children spent $40 to attend a show. a second family of three children and their two parents spent $53 for the same show. how much does a child's ticket cost?

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap