n-3n=2(7-n)-n

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Solution for n-3n=2(7-n)-n equation: 



n-3n=2(7-n)-n

We move all terms to the left:

n-3n-(2(7-n)-n)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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



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

2(-1n+7)-n

We add all the numbers together, and all the variables

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

We multiply parentheses

-1n-2n+14

We add all the numbers together, and all the variables

-3n+14

Back to the equation:

-(-3n+14)



We get rid of parentheses

-2n+3n-14=0

We add all the numbers together, and all the variables

n-14=0

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

n=14

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