-9x-1=x-21

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Solution for -9x-1=x-21 equation: 



-9x-1=x-21

We move all terms to the left:

-9x-1-(x-21)=0

We get rid of parentheses

-9x-x+21-1=0

We add all the numbers together, and all the variables

-10x+20=0

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

-10x=-20

x=-20/-10

x=+2

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