-2=u+9

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Solution for -2=u+9 equation: 



-2=u+9

We move all terms to the left:

-2-(u+9)=0

We get rid of parentheses

-u-9-2=0

We add all the numbers together, and all the variables

-1u-11=0

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

-u=11

u=11/-1

u=-11

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