21+x=2.00x

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Solution for 21+x=2.00x equation: 



21+x=2.00x

We move all terms to the left:

21+x-(2.00x)=0

We add all the numbers together, and all the variables

x-(+2.00x)+21=0

We get rid of parentheses

x-2.00x+21=0

We add all the numbers together, and all the variables

-1x+21=0

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

-x=-21

x=-21/-1

x=+21

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