The Razorback t-shirt shop makes $ 23 dollars off each t-shirt sold. During the Arkansas and Texas tech game they made $ 230 by selling t-shirts. How many t-shirts did they sell?
Let's denote the number of t-shirts sold by n. Then the shop made $ 23n dollars. 

$ 23n = $ 230 

n = $ 230/$ 23 = 10