2x-1=3x-21

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Solution for 2x-1=3x-21 equation: 



2x-1=3x-21

We move all terms to the left:

2x-1-(3x-21)=0

We get rid of parentheses

2x-3x+21-1=0

We add all the numbers together, and all the variables

-1x+20=0

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

-x=-20

x=-20/-1

x=+20

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