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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