6 packs of dvds can be bought with 120 dollars. How much does each pack cost?
: 

There are 6 packs in total. 
Each pack costs the same amount. 
120 dollars is the total amount spent. 

That means that if we divide 120 by 6, we will know how much each pack costs. 

120 divided by 6 equals 20. 

Therefore, each pack costs 20 dollars.