-12=3.9c

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Solution for -12=3.9c equation: 



-12=3.9c

We move all terms to the left:

-12-(3.9c)=0

We add all the numbers together, and all the variables

-(+3.9c)-12=0

We get rid of parentheses

-3.9c-12=0

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

-3.9c=12

c=12/-3.9

c=-3+0.3/3.9

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