21c+18=228

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Solution for 21c+18=228 equation: 



21c+18=228

We move all terms to the left:

21c+18-(228)=0

We add all the numbers together, and all the variables

21c-210=0

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

21c=210

c=210/21

c=10

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