18=9(u-8)

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Solution for 18=9(u-8) equation: 



18=9(u-8)

We move all terms to the left:

18-(9(u-8))=0



We calculate terms in parentheses: -(9(u-8)), so:

9(u-8)

We multiply parentheses

9u-72

Back to the equation:

-(9u-72)



We get rid of parentheses

-9u+72+18=0

We add all the numbers together, and all the variables

-9u+90=0

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

-9u=-90

u=-90/-9

u=+10

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