Question
There were an equal number of pupils in classes 3C and 3D. After 9 pupils transferred from Class 3C to Class 3D, there are now 45 pupils in Class 3D. How many pupils were there in each class at first?
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There were an equal number of pupils in classes 3C and 3D. After 9 pupils transferred from Class 3C to Class 3D, there are now 45 pupils in Class 3D. How many pupils were there in each class at first?