-x-9=-x+12

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Solution for -x-9=-x+12 equation: 



-x-9=-x+12

We move all terms to the left:

-x-9-(-x+12)=0

We add all the numbers together, and all the variables

-x-(-1x+12)-9=0

We add all the numbers together, and all the variables

-1x-(-1x+12)-9=0

We get rid of parentheses

-1x+1x-12-9=0

We add all the numbers together, and all the variables

-21!=0

There is no solution for this equation

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