-7n+-9=-30

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Solution for -7n+-9=-30 equation: 



-7n+-9=-30

We move all terms to the left:

-7n+-9-(-30)=0

We add all the numbers together, and all the variables

-7n+21=0

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

-7n=-21

n=-21/-7

n=+3

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