What is better, the Case IH 620 or the John Deere 9RX? Farmers only plz.

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

Witch represents the inverse of the function f(x)=1/4x-12

5x−4≥12 or 12x+5≤−4 can you with this problem