Can someone me i'm really having trouble with this and i hate it

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?

X+y=-4 x-y=2 use elimination with adding and subtraction

Aprofessional hockey team has noticed that, over the past several seasons, as the number of wins increases, the total number of hot dogs sold at the concession stands increases. the hockey team concludes that winning makes people crave hot dogs. what is wrong with the hockey team's conclusion? a) it does not take into account the attendance during each season. b) it does not take into account the number of hamburgers sold during each season. c) it does not take into account the number of concession stands in the hockey arena. d) it does not take into account the number of seasons the hockey team has been in existence.