Question
There are 40 more teachers in School B than in School C. After 25% of the teachers left School B and 50% of teachers left School C, the number of teachers who remained in School B is thrice that of the number of teachers in School C. Find the number of teachers in School B at first.
4 m

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There are 40 more teachers in School B than in School C. After 25% of the teachers left School B and 50% of teachers left School C, the number of teachers who remained in School B is thrice that of the number of teachers in School C. Find the number of teachers in School B at first.