139=9n+4

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Solution for 139=9n+4 equation: 



139=9n+4

We move all terms to the left:

139-(9n+4)=0

We get rid of parentheses

-9n-4+139=0

We add all the numbers together, and all the variables

-9n+135=0

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

-9n=-135

n=-135/-9

n=+15

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