(x-20)+(x-20)*2=180

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Solution for (x-20)+(x-20)*2=180 equation: 



(x-20)+(x-20)*2=180

We move all terms to the left:

(x-20)+(x-20)*2-(180)=0

We multiply parentheses

(x-20)+2x-40-180=0

We get rid of parentheses

x+2x-20-40-180=0

We add all the numbers together, and all the variables

3x-240=0

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

3x=240

x=240/3

x=80

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