Mathematics in Class 62

The number of students in class 62 is X, and the number of students in class 6/kloc-0 is X+X110. Then the number of students who drop from 6 1 class to 62 class is equal.

There are x+x110-2 = x, and the solution x=20, so there are 20 students in class 62, and 20+2=22 students in class 6/kloc-0.

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