Question 960183
A=cost for adult; C=cost for child=A-$6
9A+2C=$252 Substitute for C.
9A+2(A-$6)=$252
9A+2A-$12=$252 Add $12 to each side.
11A=$264 Divide each side by 11
A=$24 ANSWER 1:The price of an adult ticket was $24.
C=A-$6=$24-$6=$18 ANSWER 2: The price of a child's ticket was $18.
CHECK:
9A+2C=$252
9($24)+2($18)=$252
$216+$36=$252
$252=$252