-91=-7(-x+7)

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Solution for -91=-7(-x+7) equation: 



-91=-7(-x+7)

We move all terms to the left:

-91-(-7(-x+7))=0

We add all the numbers together, and all the variables

-(-7(-1x+7))-91=0



We calculate terms in parentheses: -(-7(-1x+7)), so:

-7(-1x+7)

We multiply parentheses

7x-49

Back to the equation:

-(7x-49)



We get rid of parentheses

-7x+49-91=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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