99=-7x-3(x+7)

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Solution for 99=-7x-3(x+7) equation: 



99=-7x-3(x+7)

We move all terms to the left:

99-(-7x-3(x+7))=0



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

-7x-3(x+7)

We multiply parentheses

-7x-3x-21

We add all the numbers together, and all the variables

-10x-21

Back to the equation:

-(-10x-21)



We get rid of parentheses

10x+21+99=0

We add all the numbers together, and all the variables

10x+120=0

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

10x=-120

x=-120/10

x=-12

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