(x-20)=80

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Solution for (x-20)=80 equation: 



(x-20)=80

We move all terms to the left:

(x-20)-(80)=0

We get rid of parentheses

x-20-80=0

We add all the numbers together, and all the variables

x-100=0

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

x=100

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