A farmer harvested 9 kilograms of lanzones and 12 kilograms of rambutan He sold 20 kilograms of the fruits he harvested and kept the rest for his family How many kilograms of fruits were kept for his family?

10.What is asked?
11.What facts are given?
12.What operations are needed to solve the problem?
13.What is the number sentence of the problem?
14.What​