-2x=-81

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Solution for -2x=-81 equation: 



-2x=-81

We move all terms to the left:

-2x-(-81)=0

We add all the numbers together, and all the variables

-2x+81=0

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

-2x=-81

x=-81/-2

x=40+1/2

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