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the October meeting of the yearbook club had 21 people attend. That was 3 times as many people as the number of people who came to the september meeting. How many people were at the September meeting?

Answer :

October meeting is 3 times more than the number of people at September meeting.
Sept meeting = 21 ÷ 3 = 7

7 people were at the September meeting.
You have to do 21x3=63

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