One-seventh of a number is 3. What is the number?

1 Answer
Serena D. · NJ
Mar 21, 2018

21

Explanation:

I'll use #n# to express the unknown number.

#1/7*n=3 rarr# One-seventh times the number (or the number divided by #7#) is three.

#n=21 rarr# Divide each side by #1/7#, the same as multiplying by #7#.

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