30=12-2c-4c

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Solution for 30=12-2c-4c equation: 



30=12-2c-4c

We move all terms to the left:

30-(12-2c-4c)=0

We add all the numbers together, and all the variables

-(-6c+12)+30=0

We get rid of parentheses

6c-12+30=0

We add all the numbers together, and all the variables

6c+18=0

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

6c=-18

c=-18/6

c=-3

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