31-n=-2(-4n+7)

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Solution for 31-n=-2(-4n+7) equation: 



31-n=-2(-4n+7)

We move all terms to the left:

31-n-(-2(-4n+7))=0

We add all the numbers together, and all the variables

-1n-(-2(-4n+7))+31=0



We calculate terms in parentheses: -(-2(-4n+7)), so:

-2(-4n+7)

We multiply parentheses

8n-14

Back to the equation:

-(8n-14)



We get rid of parentheses

-1n-8n+14+31=0

We add all the numbers together, and all the variables

-9n+45=0

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

-9n=-45

n=-45/-9

n=+5

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