21-x=-8-2x

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Solution for 21-x=-8-2x equation: 



21-x=-8-2x

We move all terms to the left:

21-x-(-8-2x)=0

We add all the numbers together, and all the variables

-x-(-2x-8)+21=0

We add all the numbers together, and all the variables

-1x-(-2x-8)+21=0

We get rid of parentheses

-1x+2x+8+21=0

We add all the numbers together, and all the variables

x+29=0

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

x=-29

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