-7=5-2n-n

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Solution for -7=5-2n-n equation: 



-7=5-2n-n

We move all terms to the left:

-7-(5-2n-n)=0

We add all the numbers together, and all the variables

-(-3n+5)-7=0

We get rid of parentheses

3n-5-7=0

We add all the numbers together, and all the variables

3n-12=0

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

3n=12

n=12/3

n=4

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