Question 960214
A=number of adult tickets; C=number of child tickets
A+C=34
A=34-C
$6A+$4C=$184 Substitute for A
$6(34-C)+$4C=$184
$204-$6C+$4C=$184 Subtract $204 from each side.
-$2C=-$20 Divide each side by -$2
C=10 ANSWER 1: Ten child tickets were sold.
A=34-C=34-10=24 ANSWER 2: Twenty-four adult tickets were sold.
CHECK:
$6A+$4C=$184 
$6(24)+$4(10)=$184
$144+$40=$184
$184=$184