The table below shows the ticket rates for whale watching trips offered by Beluga Fun Tours: Age Ticket Price Under three years free Three to 12 years $34 Over 12 years $45 On a certain day, the company took 103 people on whale watching trips. There were 64 children aged 12 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?