12=20-c

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Solution for 12=20-c equation: 



12=20-c

We move all terms to the left:

12-(20-c)=0

We add all the numbers together, and all the variables

-(-1c+20)+12=0

We get rid of parentheses

1c-20+12=0

We add all the numbers together, and all the variables

c-8=0

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

c=8

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