-21-x=21-4

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Solution for -21-x=21-4 equation: 



-21-x=21-4

We move all terms to the left:

-21-x-(21-4)=0

We add all the numbers together, and all the variables

-x-21-17=0

We add all the numbers together, and all the variables

-1x-38=0

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

-x=38

x=38/-1

x=-38

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