-131=9-10n

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Solution for -131=9-10n equation: 



-131=9-10n

We move all terms to the left:

-131-(9-10n)=0

We add all the numbers together, and all the variables

-(-10n+9)-131=0

We get rid of parentheses

10n-9-131=0

We add all the numbers together, and all the variables

10n-140=0

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

10n=140

n=140/10

n=14

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