-x+20=-31

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Solution for -x+20=-31 equation: 



-x+20=-31

We move all terms to the left:

-x+20-(-31)=0

We add all the numbers together, and all the variables

-1x+51=0

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

-x=-51

x=-51/-1

x=+51

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