Hi
One thousand tickets were sold at a game
Let x and (1000-x) represent number of adult and children tickets respectively
Question states***
$8.50x + $4.50(1000-x) = $7300
4x = 2800
x = 700,the number of adult tickets. child's 300. (1000-700)
CHECKING our Answer
700*$8.50 + 300*$4.50 = $7300