12=20+7c

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Solution for 12=20+7c equation: 



12=20+7c

We move all terms to the left:

12-(20+7c)=0

We add all the numbers together, and all the variables

-(7c+20)+12=0

We get rid of parentheses

-7c-20+12=0

We add all the numbers together, and all the variables

-7c-8=0

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

-7c=8

c=8/-7

c=-1+1/7

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