(2x+21)=x

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Solution for (2x+21)=x equation: 



(2x+21)=x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-1x+2x+21=0

We add all the numbers together, and all the variables

x+21=0

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

x=-21

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