9(u-1)=-81

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Solution for 9(u-1)=-81 equation: 



9(u-1)=-81

We move all terms to the left:

9(u-1)-(-81)=0

We add all the numbers together, and all the variables

9(u-1)+81=0

We multiply parentheses

9u-9+81=0

We add all the numbers together, and all the variables

9u+72=0

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

9u=-72

u=-72/9

u=-8

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