9=3(u-1)

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Solution for 9=3(u-1) equation: 



9=3(u-1)

We move all terms to the left:

9-(3(u-1))=0



We calculate terms in parentheses: -(3(u-1)), so:

3(u-1)

We multiply parentheses

3u-3

Back to the equation:

-(3u-3)



We get rid of parentheses

-3u+3+9=0

We add all the numbers together, and all the variables

-3u+12=0

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

-3u=-12

u=-12/-3

u=+4

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