21=x-0.6x

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Solution for 21=x-0.6x equation: 



21=x-0.6x

We move all terms to the left:

21-(x-0.6x)=0

We add all the numbers together, and all the variables

-(+0.4x)+21=0

We get rid of parentheses

-0.4x+21=0

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

-0.4x=-21

x=-21/-0.4

x=52+0.2/0.4

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