120=6(3n-1)+3n

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Solution for 120=6(3n-1)+3n equation: 



120=6(3n-1)+3n

We move all terms to the left:

120-(6(3n-1)+3n)=0



We calculate terms in parentheses: -(6(3n-1)+3n), so:

6(3n-1)+3n

We add all the numbers together, and all the variables

3n+6(3n-1)

We multiply parentheses

3n+18n-6

We add all the numbers together, and all the variables

21n-6

Back to the equation:

-(21n-6)



We get rid of parentheses

-21n+6+120=0

We add all the numbers together, and all the variables

-21n+126=0

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

-21n=-126

n=-126/-21

n=+6

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