20-x=2x-1

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



20-x=2x-1

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-1x-2x+1+20=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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