9c-18=7c

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Solution for 9c-18=7c equation: 



9c-18=7c

We move all terms to the left:

9c-18-(7c)=0

We add all the numbers together, and all the variables

2c-18=0

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

2c=18

c=18/2

c=9

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