-105=-3(7n+7)

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Solution for -105=-3(7n+7) equation: 



-105=-3(7n+7)

We move all terms to the left:

-105-(-3(7n+7))=0



We calculate terms in parentheses: -(-3(7n+7)), so:

-3(7n+7)

We multiply parentheses

-21n-21

Back to the equation:

-(-21n-21)



We get rid of parentheses

21n+21-105=0

We add all the numbers together, and all the variables

21n-84=0

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

21n=84

n=84/21

n=4

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