180=x-(90-20)

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Solution for 180=x-(90-20) equation: 



180=x-(90-20)

We move all terms to the left:

180-(x-(90-20))=0

We add all the numbers together, and all the variables

-(x-70)+180=0

We get rid of parentheses

-x+70+180=0

We add all the numbers together, and all the variables

-1x+250=0

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

-x=-250

x=-250/-1

x=+250

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