Y=2x+6. Find the following linear equations

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

What term makes it inconsistent y=2x - 4

With both problems. a.s.a.p directions on photo ^