13-3n=4(3n+7)

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Solution for 13-3n=4(3n+7) equation: 



13-3n=4(3n+7)

We move all terms to the left:

13-3n-(4(3n+7))=0



We calculate terms in parentheses: -(4(3n+7)), so:

4(3n+7)

We multiply parentheses

12n+28

Back to the equation:

-(12n+28)



We get rid of parentheses

-3n-12n-28+13=0

We add all the numbers together, and all the variables

-15n-15=0

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

-15n=15

n=15/-15

n=-1

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