129=-2x+3(-4x+15)

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Solution for 129=-2x+3(-4x+15) equation: 



129=-2x+3(-4x+15)

We move all terms to the left:

129-(-2x+3(-4x+15))=0



We calculate terms in parentheses: -(-2x+3(-4x+15)), so:

-2x+3(-4x+15)

We multiply parentheses

-2x-12x+45

We add all the numbers together, and all the variables

-14x+45

Back to the equation:

-(-14x+45)



We get rid of parentheses

14x-45+129=0

We add all the numbers together, and all the variables

14x+84=0

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

14x=-84

x=-84/14

x=-6

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