-90=9(u-6)

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Solution for -90=9(u-6) equation: 



-90=9(u-6)

We move all terms to the left:

-90-(9(u-6))=0



We calculate terms in parentheses: -(9(u-6)), so:

9(u-6)

We multiply parentheses

9u-54

Back to the equation:

-(9u-54)



We get rid of parentheses

-9u+54-90=0

We add all the numbers together, and all the variables

-9u-36=0

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

-9u=36

u=36/-9

u=-4

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