-80=-120-x

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Solution for -80=-120-x equation: 



-80=-120-x

We move all terms to the left:

-80-(-120-x)=0

We add all the numbers together, and all the variables

-(-1x-120)-80=0

We get rid of parentheses

1x+120-80=0

We add all the numbers together, and all the variables

x+40=0

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

x=-40

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