21=51x+2x

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Solution for 21=51x+2x equation: 



21=51x+2x

We move all terms to the left:

21-(51x+2x)=0

We add all the numbers together, and all the variables

-(+53x)+21=0

We get rid of parentheses

-53x+21=0

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

-53x=-21

x=-21/-53

x=21/53

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