4+n-9=-9+1+2n=12

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Solution for 4+n-9=-9+1+2n=12 equation: 



4+n-9=-9+1+2n=12

We move all terms to the left:

4+n-9-(-9+1+2n)=0

We add all the numbers together, and all the variables

n-(2n-8)+4-9=0

We add all the numbers together, and all the variables

n-(2n-8)-5=0

We get rid of parentheses

n-2n+8-5=0

We add all the numbers together, and all the variables

-1n+3=0

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

-n=-3

n=-3/-1

n=+3

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