Baker made 43 cakes. He sold some of them. If he still has 37 cakes left How many cakes did baker sell?
1. We know that the baker started with 43 cakes. 
2. We know that he sold some of them, which means that he now has fewer than 43 cakes. 
3. We know that he has 37 cakes left. 

So, we can say that the baker sold 6 cakes.