-9x+80=-1

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Solution for -9x+80=-1 equation: 



-9x+80=-1

We move all terms to the left:

-9x+80-(-1)=0

We add all the numbers together, and all the variables

-9x+81=0

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

-9x=-81

x=-81/-9

x=+9

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