(6x-21)=x

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Solution for (6x-21)=x equation: 



(6x-21)=x

We move all terms to the left:

(6x-21)-(x)=0

We add all the numbers together, and all the variables

-1x+(6x-21)=0

We get rid of parentheses

-1x+6x-21=0

We add all the numbers together, and all the variables

5x-21=0

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

5x=21

x=21/5

x=4+1/5

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