18=7c+8c

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Solution for 18=7c+8c equation: 



18=7c+8c

We move all terms to the left:

18-(7c+8c)=0

We add all the numbers together, and all the variables

-(+15c)+18=0

We get rid of parentheses

-15c+18=0

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

-15c=-18

c=-18/-15

c=1+1/5

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