81=11+5u

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Solution for 81=11+5u equation: 



81=11+5u

We move all terms to the left:

81-(11+5u)=0

We add all the numbers together, and all the variables

-(5u+11)+81=0

We get rid of parentheses

-5u-11+81=0

We add all the numbers together, and all the variables

-5u+70=0

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

-5u=-70

u=-70/-5

u=+14

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