A local hamburger shop sold a combined total of 566 hamburgers and cheeseburgers on Saturday. There were 66 more cheeseburgers sold than hamburgers. How many hamburgers were sold on Saturday? ... ?

Let us assume the number of hamburgers sold = x

Then

The total number of cheeseburgers sold = x + 66

Total number of hamburgers and cheeseburgers sold = 566

So

x + x + 66 = 566

2x + 66 = 566

2x = 566 - 66

2x = 500

x = 500/2

= 250

From the above deduction, it can be easily concluded that the total number of hamburgers sold was 250. I hope that the procedure is clear enough for you to understand.