Question
There were an equal number of pupils in classes 1R and 1S. After 9 pupils transferred from Class 1R to Class 1S, there are now 60 pupils in Class 1S. How many pupils were there in each class at first?
4 m

Click button first when a symbol is required. X

There were an equal number of pupils in classes 1R and 1S. After 9 pupils transferred from Class 1R to Class 1S, there are now 60 pupils in Class 1S. How many pupils were there in each class at first?