18+18=15+15+c

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Solution for 18+18=15+15+c equation: 



18+18=15+15+c

We move all terms to the left:

18+18-(15+15+c)=0

We add all the numbers together, and all the variables

-(c+30)+18+18=0

We add all the numbers together, and all the variables

-(c+30)+36=0

We get rid of parentheses

-c-30+36=0

We add all the numbers together, and all the variables

-1c+6=0

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

-c=-6

c=-6/-1

c=+6

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