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

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