-(u-9)=1

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



-(u-9)=1

We move all terms to the left:

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

We get rid of parentheses

-u+9-1=0

We add all the numbers together, and all the variables

-1u+8=0

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

-u=-8

u=-8/-1

u=+8

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