30=9+2x+x

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Solution for 30=9+2x+x equation: 



30=9+2x+x

We move all terms to the left:

30-(9+2x+x)=0

We add all the numbers together, and all the variables

-(3x+9)+30=0

We get rid of parentheses

-3x-9+30=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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