21-7n=48-4n

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Solution for 21-7n=48-4n equation: 



21-7n=48-4n

We move all terms to the left:

21-7n-(48-4n)=0

We add all the numbers together, and all the variables

-7n-(-4n+48)+21=0

We get rid of parentheses

-7n+4n-48+21=0

We add all the numbers together, and all the variables

-3n-27=0

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

-3n=27

n=27/-3

n=-9

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