20=-x+9

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Solution for 20=-x+9 equation: 



20=-x+9

We move all terms to the left:

20-(-x+9)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

1x-9+20=0

We add all the numbers together, and all the variables

x+11=0

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

x=-11

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