9c+3=21

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Solution for 9c+3=21 equation: 



9c+3=21

We move all terms to the left:

9c+3-(21)=0

We add all the numbers together, and all the variables

9c-18=0

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

9c=18

c=18/9

c=2

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