3c-9=30

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Solution for 3c-9=30 equation: 



3c-9=30

We move all terms to the left:

3c-9-(30)=0

We add all the numbers together, and all the variables

3c-39=0

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

3c=39

c=39/3

c=13

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