261=-3(1+10n)-3n

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Solution for 261=-3(1+10n)-3n equation: 



261=-3(1+10n)-3n

We move all terms to the left:

261-(-3(1+10n)-3n)=0

We add all the numbers together, and all the variables

-(-3(10n+1)-3n)+261=0



We calculate terms in parentheses: -(-3(10n+1)-3n), so:

-3(10n+1)-3n

We add all the numbers together, and all the variables

-3n-3(10n+1)

We multiply parentheses

-3n-30n-3

We add all the numbers together, and all the variables

-33n-3

Back to the equation:

-(-33n-3)



We get rid of parentheses

33n+3+261=0

We add all the numbers together, and all the variables

33n+264=0

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

33n=-264

n=-264/33

n=-8

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