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morpeh [17]
3 years ago
9

Three times a certain number, n, is 21​

Mathematics
1 answer:
Phantasy [73]3 years ago
7 0

Answer: 7

Step-by-step explanation:

3n=21

n=7

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Read more at Answer.Ya.Guru – https://answer.ya.guru/questions/4046336-if-df-9x-39-find-ef.html
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