9=-9(u+11)

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Solution for 9=-9(u+11) equation: 



9=-9(u+11)

We move all terms to the left:

9-(-9(u+11))=0



We calculate terms in parentheses: -(-9(u+11)), so:

-9(u+11)

We multiply parentheses

-9u-99

Back to the equation:

-(-9u-99)



We get rid of parentheses

9u+99+9=0

We add all the numbers together, and all the variables

9u+108=0

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

9u=-108

u=-108/9

u=-12

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