4n+3n-9=2n+5n=21

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Solution for 4n+3n-9=2n+5n=21 equation: 



4n+3n-9=2n+5n=21

We move all terms to the left:

4n+3n-9-(2n+5n)=0

We add all the numbers together, and all the variables

4n+3n-(+7n)-9=0

We add all the numbers together, and all the variables

7n-(+7n)-9=0

We get rid of parentheses

7n-7n-9=0

We add all the numbers together, and all the variables

-9!=0

There is no solution for this equation

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