-21=-19+x

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Solution for -21=-19+x equation: 



-21=-19+x

We move all terms to the left:

-21-(-19+x)=0

We add all the numbers together, and all the variables

-(x-19)-21=0

We get rid of parentheses

-x+19-21=0

We add all the numbers together, and all the variables

-1x-2=0

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

-x=2

x=2/-1

x=-2

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