10n+9=-121

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Solution for 10n+9=-121 equation: 



10n+9=-121

We move all terms to the left:

10n+9-(-121)=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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