12-9+c=12*

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Solution for 12-9+c=12* equation: 



12-9+c=12*

We move all terms to the left:

12-9+c-(12*)=0

We add all the numbers together, and all the variables

c+12-9-0=0

We add all the numbers together, and all the variables

c+3=0

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

c=-3

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