(x-20)+(x-40)=x

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Solution for (x-20)+(x-40)=x equation: 



(x-20)+(x-40)=x

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1x+(x-20)+(x-40)=0

We get rid of parentheses

-1x+x+x-20-40=0

We add all the numbers together, and all the variables

x-60=0

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

x=60

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