18n+21=27n+3

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Solution for 18n+21=27n+3 equation: 



18n+21=27n+3

We move all terms to the left:

18n+21-(27n+3)=0

We get rid of parentheses

18n-27n-3+21=0

We add all the numbers together, and all the variables

-9n+18=0

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

-9n=-18

n=-18/-9

n=+2

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