A group of 21 people went to the country fair with 9 people on a stagecoach and 3 people in each buggy. On the return trip, 4 people rode in each buggy. How many people returned on the stagecoach?

3 answers

how many buggies?
21 = 9 + 3 n
n = 4

4*4 = 16

21 - 16 = 5
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