81=9(u+76)

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Solution for 81=9(u+76) equation: 



81=9(u+76)

We move all terms to the left:

81-(9(u+76))=0



We calculate terms in parentheses: -(9(u+76)), so:

9(u+76)

We multiply parentheses

9u+684

Back to the equation:

-(9u+684)



We get rid of parentheses

-9u-684+81=0

We add all the numbers together, and all the variables

-9u-603=0

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

-9u=603

u=603/-9

u=-67

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