28=9x-2x

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Solution for 28=9x-2x equation: 



28=9x-2x

We move all terms to the left:

28-(9x-2x)=0

We add all the numbers together, and all the variables

-(+7x)+28=0

We get rid of parentheses

-7x+28=0

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

-7x=-28

x=-28/-7

x=+4

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