30=c+9+2c

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



30=c+9+2c

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(3c+9)+30=0

We get rid of parentheses

-3c-9+30=0

We add all the numbers together, and all the variables

-3c+21=0

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

-3c=-21

c=-21/-3

c=+7

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