x-9=-20.

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Solution for x-9=-20. equation: 



x-9=-20.

We move all terms to the left:

x-9-(-20.)=0

We add all the numbers together, and all the variables

x-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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