Assuming you mean that x is the number of rows of seats at $140 each andy is the number rows of seats sold at $60 each,
then 40x+ 70y is the total number of seats so, yes, 40x+ 70y= 7000
No, this is not correct. With x the number of rows of seats in the first section, and y the number of rows of seats in the other section, the fact that "There are 10 more rows in the inner section than that of the outer section" tells us that x= y+ 10. Because there are 10 more rows rather than seats, we do NOT multiply by the number of seats per row and we do not have the "10" on both sides of the equation,2. 40x+10=70y-10 => 70y-40x=20?