4n+21=2n+27

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Solution for 4n+21=2n+27 equation: 



4n+21=2n+27

We move all terms to the left:

4n+21-(2n+27)=0

We get rid of parentheses

4n-2n-27+21=0

We add all the numbers together, and all the variables

2n-6=0

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

2n=6

n=6/2

n=3

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