0=-(u-9)

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Solution for 0=-(u-9) equation: 



0=-(u-9)

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(-(u-9))=0



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

-(u-9)

We get rid of parentheses

-u+9

We add all the numbers together, and all the variables

-1u+9

Back to the equation:

-(-1u+9)



We get rid of parentheses

1u-9=0

We add all the numbers together, and all the variables

u-9=0

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

u=9

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