Consider that a concert promoter needs to make $120,000 from the sale of 2600 tickets. The promoter charges $40 for some tickets and $60 for then others.

(a) Suppose there are x of the $40 tickets and y of the $60 tickets.

Let us write an equation that states that the total number of the tickets sold is 2600.

Since the number of $40 tickets is x, and the number of $60 tickets is y and the total number of tickets sold is 2600.

Thus, the equation that states the total number of tickets sold is.