Question

On Friday a local hamburger shop sold a combination total of 420 hamburgers and cheeseburgers. the number cheeseburgers sold was three times the number of hamburger sold. how many hamburgers were sold on Friday?

Answer 1

105 hamburgers were sold.

Explanation:

In order for the number of cheeseburgers to be 3 times the number of hamburgers, the hamburgers must be 1/4 of the total amount sold. 420/4 = 105. This leaves the number of cheeseburgers as 315. 105 x 3 = 315, which proves this is right.