-18=3c-7c

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Solution for -18=3c-7c equation: 



-18=3c-7c

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(-4c)-18=0

We get rid of parentheses

4c-18=0

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

4c=18

c=18/4

c=4+1/2

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