7=1+2n+8

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Solution for 7=1+2n+8 equation: 



7=1+2n+8

We move all terms to the left:

7-(1+2n+8)=0

We add all the numbers together, and all the variables

-(2n+9)+7=0

We get rid of parentheses

-2n-9+7=0

We add all the numbers together, and all the variables

-2n-2=0

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

-2n=2

n=2/-2

n=-1

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