-129=-2(5+5x)-7x

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Solution for -129=-2(5+5x)-7x equation: 



-129=-2(5+5x)-7x

We move all terms to the left:

-129-(-2(5+5x)-7x)=0

We add all the numbers together, and all the variables

-(-2(5x+5)-7x)-129=0



We calculate terms in parentheses: -(-2(5x+5)-7x), so:

-2(5x+5)-7x

We add all the numbers together, and all the variables

-7x-2(5x+5)

We multiply parentheses

-7x-10x-10

We add all the numbers together, and all the variables

-17x-10

Back to the equation:

-(-17x-10)



We get rid of parentheses

17x+10-129=0

We add all the numbers together, and all the variables

17x-119=0

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

17x=119

x=119/17

x=7

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