21=35-n

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Solution for 21=35-n equation: 



21=35-n

We move all terms to the left:

21-(35-n)=0

We add all the numbers together, and all the variables

-(-1n+35)+21=0

We get rid of parentheses

1n-35+21=0

We add all the numbers together, and all the variables

n-14=0

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

n=14

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