9x+20=-x

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Solution for 9x+20=-x equation: 



9x+20=-x

We move all terms to the left:

9x+20-(-x)=0

We add all the numbers together, and all the variables

9x-(-1x)+20=0

We get rid of parentheses

9x+1x+20=0

We add all the numbers together, and all the variables

10x+20=0

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

10x=-20

x=-20/10

x=-2

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