7n/21=1

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Solution for 7n/21=1 equation: 



7n/21=1

We move all terms to the left:

7n/21-(1)=0

We multiply all the terms by the denominator


7n-1*21=0

We add all the numbers together, and all the variables

7n-21=0

We move all terms containing n to the left, all other terms to the right

7n=21

n=21/7

n=3

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