12c-4-1=9c+4

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Solution for 12c-4-1=9c+4 equation: 



12c-4-1=9c+4

We move all terms to the left:

12c-4-1-(9c+4)=0

We add all the numbers together, and all the variables

12c-(9c+4)-5=0

We get rid of parentheses

12c-9c-4-5=0

We add all the numbers together, and all the variables

3c-9=0

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

3c=9

c=9/3

c=3

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