Question

suppose you go to a concert and purchase three identical t-shirts and a hat that hat cost $21 and you spend $60 an hour how much does each t-shirt cost?

Answer 1

60-21=39
39 divided by 3=13
each t-shirt cost $13.

to check:
13 times 3=39 
39+21=60

hope I helped :)

Answer 2

Each shirt costs $13.