4+7=n+21

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Solution for 4+7=n+21 equation: 



4+7=n+21

We move all terms to the left:

4+7-(n+21)=0

We add all the numbers together, and all the variables

-(n+21)+11=0

We get rid of parentheses

-n-21+11=0

We add all the numbers together, and all the variables

-1n-10=0

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

-n=10

n=10/-1

n=-10

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