1-2n=-21

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Solution for 1-2n=-21 equation: 



1-2n=-21

We move all terms to the left:

1-2n-(-21)=0

We add all the numbers together, and all the variables

-2n+22=0

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

-2n=-22

n=-22/-2

n=+11

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