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kogti [31]
3 years ago
10

A city has 3 new houses for every 9 old houses. If there are 21 new houses in the city, how many old houses are there?

Mathematics
1 answer:
kipiarov [429]3 years ago
5 0
To find your answer you would divide 21 by 3 which would be 7, once you've got 7 you would multiply it by 9 which would give you the amount of old houses that there is which would be 63.
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