Question
There are 30 more teachers in School N than in School P. After 20% of the teachers left School N and 50% of teachers left School P, the number of teachers who remained in School N is four times that of the number of teachers in School P. Find the number of teachers in School N at first.
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There are 30 more teachers in School N than in School P. After 20% of the teachers left School N and 50% of teachers left School P, the number of teachers who remained in School N is four times that of the number of teachers in School P. Find the number of teachers in School N at first.