-1=0x-21

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Solution for -1=0x-21 equation: 



-1=0x-21

We move all terms to the left:

-1-(0x-21)=0

We add all the numbers together, and all the variables

-(x-21)-1=0

We get rid of parentheses

-x+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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