4n+(3-2n)=21

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Solution for 4n+(3-2n)=21 equation: 



4n+(3-2n)=21

We move all terms to the left:

4n+(3-2n)-(21)=0

We add all the numbers together, and all the variables

4n+(-2n+3)-21=0

We get rid of parentheses

4n-2n+3-21=0

We add all the numbers together, and all the variables

2n-18=0

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

2n=18

n=18/2

n=9

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