How many hamburgers were sold on Thursday?

Question

A local hamburger shop sold a combined total of
379
hamburgers and cheeseburgers on Thursday. There were
71
fewer cheeseburgers sold than hamburgers. How many hamburgers were sold on Thursday?

Answer 1

c = h - 71

c + h = 379

 

Since c and h - 71 are equal, we can substitute one for the other.

 

h + 71 + h = 379

2h + 71 = 379

2h + 71 - 71 = 379 - 71

2h = 308

2h/2 = 308/2

h = 154

 

154 hamburgers were sold Thursday.