-20=9+x

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Solution for -20=9+x equation: 



-20=9+x

We move all terms to the left:

-20-(9+x)=0

We add all the numbers together, and all the variables

-(x+9)-20=0

We get rid of parentheses

-x-9-20=0

We add all the numbers together, and all the variables

-1x-29=0

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

-x=29

x=29/-1

x=-29

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