5n=2n+21

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Solution for 5n=2n+21 equation: 



5n=2n+21

We move all terms to the left:

5n-(2n+21)=0

We get rid of parentheses

5n-2n-21=0

We add all the numbers together, and all the variables

3n-21=0

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

3n=21

n=21/3

n=7

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