-129=4x+7(1-3x)

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Solution for -129=4x+7(1-3x) equation: 



-129=4x+7(1-3x)

We move all terms to the left:

-129-(4x+7(1-3x))=0

We add all the numbers together, and all the variables

-(4x+7(-3x+1))-129=0



We calculate terms in parentheses: -(4x+7(-3x+1)), so:

4x+7(-3x+1)

We multiply parentheses

4x-21x+7

We add all the numbers together, and all the variables

-17x+7

Back to the equation:

-(-17x+7)



We get rid of parentheses

17x-7-129=0

We add all the numbers together, and all the variables

17x-136=0

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

17x=136

x=136/17

x=8

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