139=-10n+9

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Solution for 139=-10n+9 equation: 



139=-10n+9

We move all terms to the left:

139-(-10n+9)=0

We get rid of parentheses

10n-9+139=0

We add all the numbers together, and all the variables

10n+130=0

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

10n=-130

n=-130/10

n=-13

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