61=2n+21

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Solution for 61=2n+21 equation: 



61=2n+21

We move all terms to the left:

61-(2n+21)=0

We get rid of parentheses

-2n-21+61=0

We add all the numbers together, and all the variables

-2n+40=0

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

-2n=-40

n=-40/-2

n=+20

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