7(3+4n)=21+4n

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Solution for 7(3+4n)=21+4n equation: 



7(3+4n)=21+4n

We move all terms to the left:

7(3+4n)-(21+4n)=0

We add all the numbers together, and all the variables

7(4n+3)-(4n+21)=0

We multiply parentheses

28n-(4n+21)+21=0

We get rid of parentheses

28n-4n-21+21=0

We add all the numbers together, and all the variables

24n=0

n=0/24

n=0

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