9=3(u-10)

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Solution for 9=3(u-10) equation: 



9=3(u-10)

We move all terms to the left:

9-(3(u-10))=0



We calculate terms in parentheses: -(3(u-10)), so:

3(u-10)

We multiply parentheses

3u-30

Back to the equation:

-(3u-30)



We get rid of parentheses

-3u+30+9=0

We add all the numbers together, and all the variables

-3u+39=0

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

-3u=-39

u=-39/-3

u=+13

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