13=-7-2n

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Solution for 13=-7-2n equation: 



13=-7-2n

We move all terms to the left:

13-(-7-2n)=0

We add all the numbers together, and all the variables

-(-2n-7)+13=0

We get rid of parentheses

2n+7+13=0

We add all the numbers together, and all the variables

2n+20=0

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

2n=-20

n=-20/2

n=-10

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