45=-3(1+3n)-3n

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Solution for 45=-3(1+3n)-3n equation: 



45=-3(1+3n)-3n

We move all terms to the left:

45-(-3(1+3n)-3n)=0

We add all the numbers together, and all the variables

-(-3(3n+1)-3n)+45=0



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

-3(3n+1)-3n

We add all the numbers together, and all the variables

-3n-3(3n+1)

We multiply parentheses

-3n-9n-3

We add all the numbers together, and all the variables

-12n-3

Back to the equation:

-(-12n-3)



We get rid of parentheses

12n+3+45=0

We add all the numbers together, and all the variables

12n+48=0

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

12n=-48

n=-48/12

n=-4

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