3=9+c

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Solution for 3=9+c equation: 



3=9+c

We move all terms to the left:

3-(9+c)=0

We add all the numbers together, and all the variables

-(c+9)+3=0

We get rid of parentheses

-c-9+3=0

We add all the numbers together, and all the variables

-1c-6=0

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

-c=6

c=6/-1

c=-6

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