4n+7-2=21

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Solution for 4n+7-2=21 equation: 



4n+7-2=21

We move all terms to the left:

4n+7-2-(21)=0

We add all the numbers together, and all the variables

4n-16=0

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

4n=16

n=16/4

n=4

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