Question 368396
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Hi,
Let x represent the cost of the child's ticket.  
then (x+$8) would be the adult's cost of a ticket
2x + 4(x+$8) =$92
6x + 32 = $92
6x = $60
x = $10, child's ticket cost.  The Adult ticket $18 ($10+$8)
checking our answer
$20 + $72 = $92