3^2-4*12=c

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Solution for 3^2-4*12=c equation: 



3^2-4*12=c

We move all terms to the left:

3^2-4*12-(c)=0

We add all the numbers together, and all the variables

-1c-39=0

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

-c=39

c=39/-1

c=-39

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