-81=-3(5-5n)-4n

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Solution for -81=-3(5-5n)-4n equation: 



-81=-3(5-5n)-4n

We move all terms to the left:

-81-(-3(5-5n)-4n)=0

We add all the numbers together, and all the variables

-(-3(-5n+5)-4n)-81=0



We calculate terms in parentheses: -(-3(-5n+5)-4n), so:

-3(-5n+5)-4n

We add all the numbers together, and all the variables

-4n-3(-5n+5)

We multiply parentheses

-4n+15n-15

We add all the numbers together, and all the variables

11n-15

Back to the equation:

-(11n-15)



We get rid of parentheses

-11n+15-81=0

We add all the numbers together, and all the variables

-11n-66=0

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

-11n=66

n=66/-11

n=-6

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