3n+9n=-2(7-4n)-(1-n)

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Solution for 3n+9n=-2(7-4n)-(1-n) equation: 



3n+9n=-2(7-4n)-(1-n)

We move all terms to the left:

3n+9n-(-2(7-4n)-(1-n))=0

We add all the numbers together, and all the variables

3n+9n-(-2(-4n+7)-(-1n+1))=0

We add all the numbers together, and all the variables

12n-(-2(-4n+7)-(-1n+1))=0



We calculate terms in parentheses: -(-2(-4n+7)-(-1n+1)), so:

-2(-4n+7)-(-1n+1)

We multiply parentheses

8n-(-1n+1)-14

We get rid of parentheses

8n+1n-1-14

We add all the numbers together, and all the variables

9n-15

Back to the equation:

-(9n-15)



We get rid of parentheses

12n-9n+15=0

We add all the numbers together, and all the variables

3n+15=0

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

3n=-15

n=-15/3

n=-5

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