There are a total of 9 peaches in a basket. If there are 2 red peaches and some more green peaches in the basket. How many green peaches are in the basket?
There are 9 peaches in the basket. 
2 of those peaches are red. 
That means that there are 7 peaches that are not red. 
All of those 7 peaches are green. 

Therefore, there are 7 green peaches in the basket.