9c+21=93

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Solution for 9c+21=93 equation: 



9c+21=93

We move all terms to the left:

9c+21-(93)=0

We add all the numbers together, and all the variables

9c-72=0

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

9c=72

c=72/9

c=8

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