Question
There were some children in the auditorium. After 7 girls left the auditorium and 23 boys entered the auditorium, there were 160 children in the auditorium. How many children were there in the auditorium at first?
2 m

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There were some children in the auditorium. After 7 girls left the auditorium and 23 boys entered the auditorium, there were 160 children in the auditorium. How many children were there in the auditorium at first?