39=-21n+18

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Solution for 39=-21n+18 equation: 



39=-21n+18

We move all terms to the left:

39-(-21n+18)=0

We get rid of parentheses

21n-18+39=0

We add all the numbers together, and all the variables

21n+21=0

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

21n=-21

n=-21/21

n=-1

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