x-1=2x-20

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Solution for x-1=2x-20 equation: 



x-1=2x-20

We move all terms to the left:

x-1-(2x-20)=0

We get rid of parentheses

x-2x+20-1=0

We add all the numbers together, and all the variables

-1x+19=0

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

-x=-19

x=-19/-1

x=+19

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