129-(3x+9)=180

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Solution for 129-(3x+9)=180 equation: 



129-(3x+9)=180

We move all terms to the left:

129-(3x+9)-(180)=0

We add all the numbers together, and all the variables

-(3x+9)-51=0

We get rid of parentheses

-3x-9-51=0

We add all the numbers together, and all the variables

-3x-60=0

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

-3x=60

x=60/-3

x=-20

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