-105=-7x-7(-2x+21)

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Solution for -105=-7x-7(-2x+21) equation: 



-105=-7x-7(-2x+21)

We move all terms to the left:

-105-(-7x-7(-2x+21))=0



We calculate terms in parentheses: -(-7x-7(-2x+21)), so:

-7x-7(-2x+21)

We multiply parentheses

-7x+14x-147

We add all the numbers together, and all the variables

7x-147

Back to the equation:

-(7x-147)



We get rid of parentheses

-7x+147-105=0

We add all the numbers together, and all the variables

-7x+42=0

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

-7x=-42

x=-42/-7

x=+6

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