4n-15=21-2n

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Solution for 4n-15=21-2n equation: 



4n-15=21-2n

We move all terms to the left:

4n-15-(21-2n)=0

We add all the numbers together, and all the variables

4n-(-2n+21)-15=0

We get rid of parentheses

4n+2n-21-15=0

We add all the numbers together, and all the variables

6n-36=0

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

6n=36

n=36/6

n=6

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