81=11+10c

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Solution for 81=11+10c equation: 



81=11+10c

We move all terms to the left:

81-(11+10c)=0

We add all the numbers together, and all the variables

-(10c+11)+81=0

We get rid of parentheses

-10c-11+81=0

We add all the numbers together, and all the variables

-10c+70=0

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

-10c=-70

c=-70/-10

c=+7

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