The table below shows the ticket rates for whale watching trips offered by dolphin tricks & tours.

age ticket price
under three years free
three to twelve years $35
over twelve years $46

on a certain day, the company took 88 people on whale watching trips. there were 44 children aged twelve and under, of which some children were under three years. if x represents the number of children under three years, which equation can be used to find the value of x, where c represents the total amount of money collected from tickets that day?