At a concert 20% of the audience member were teenagers is the number of teenagers are the concert was 360 what was the total number of audience members

Let's call  x = profit from the sweatshirt sales  1) a vendor pays to rock band 13% of the total profit from t-shirts and sweatshirts sold at every concert.  2) the profit from t-shirts sales was $ 1,632  3) the vendor paid the rock band $ 726 after the last concert  we then have the following equation:   0.13 * (1632 + x) = 726  clearing x:   (1632 + x) = (726 / 0.13)  x = (726 / 0.13) - 1632 = 3953 $  answer:   the profit from sweatshirt sales was 3953 $