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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



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

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

We multiply parentheses

-(4n+7)-4n-8

We get rid of parentheses

-4n-4n-7-8

We add all the numbers together, and all the variables

-8n-15

Back to the equation:

-(-8n-15)



We get rid of parentheses

8n+15-31=0

We add all the numbers together, and all the variables

8n-16=0

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

8n=16

n=16/8

n=2

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