-4x=-81

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Solution for -4x=-81 equation: 



-4x=-81

We move all terms to the left:

-4x-(-81)=0

We add all the numbers together, and all the variables

-4x+81=0

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

-4x=-81

x=-81/-4

x=20+1/4

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