-x-x-2x=80

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Solution for -x-x-2x=80 equation: 



-x-x-2x=80

We move all terms to the left:

-x-x-2x-(80)=0

We add all the numbers together, and all the variables

-4x-80=0

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

-4x=80

x=80/-4

x=-20

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