9-(x-9)=20

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Solution for 9-(x-9)=20 equation: 



9-(x-9)=20

We move all terms to the left:

9-(x-9)-(20)=0

We add all the numbers together, and all the variables

-(x-9)-11=0

We get rid of parentheses

-x+9-11=0

We add all the numbers together, and all the variables

-1x-2=0

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

-x=2

x=2/-1

x=-2

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