-x-21=5+x

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Solution for -x-21=5+x equation: 



-x-21=5+x

We move all terms to the left:

-x-21-(5+x)=0

We add all the numbers together, and all the variables

-x-(x+5)-21=0

We add all the numbers together, and all the variables

-1x-(x+5)-21=0

We get rid of parentheses

-1x-x-5-21=0

We add all the numbers together, and all the variables

-2x-26=0

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

-2x=26

x=26/-2

x=-13

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