18c-30=7(3c-9)

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Solution for 18c-30=7(3c-9) equation: 



18c-30=7(3c-9)

We move all terms to the left:

18c-30-(7(3c-9))=0



We calculate terms in parentheses: -(7(3c-9)), so:

7(3c-9)

We multiply parentheses

21c-63

Back to the equation:

-(21c-63)



We get rid of parentheses

18c-21c+63-30=0

We add all the numbers together, and all the variables

-3c+33=0

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

-3c=-33

c=-33/-3

c=+11

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