3(n+7)=3n+21

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Solution for 3(n+7)=3n+21 equation: 



3(n+7)=3n+21

We move all terms to the left:

3(n+7)-(3n+21)=0

We multiply parentheses

3n-(3n+21)+21=0

We get rid of parentheses

3n-3n-21+21=0

We add all the numbers together, and all the variables

=0

n=0/1

n=0

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