4n+7+3n=21

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



4n+7+3n=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

7n-14=0

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

7n=14

n=14/7

n=2

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