7(2n+1)=21

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Solution for 7(2n+1)=21 equation: 



7(2n+1)=21

We move all terms to the left:

7(2n+1)-(21)=0

We multiply parentheses

14n+7-21=0

We add all the numbers together, and all the variables

14n-14=0

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

14n=14

n=14/14

n=1

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