80=-20+x

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Solution for 80=-20+x equation: 



80=-20+x

We move all terms to the left:

80-(-20+x)=0

We add all the numbers together, and all the variables

-(x-20)+80=0

We get rid of parentheses

-x+20+80=0

We add all the numbers together, and all the variables

-1x+100=0

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

-x=-100

x=-100/-1

x=+100

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