(80-x)=180

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Solution for (80-x)=180 equation: 



(80-x)=180

We move all terms to the left:

(80-x)-(180)=0

We add all the numbers together, and all the variables

(-1x+80)-180=0

We get rid of parentheses

-1x+80-180=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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