6u-9=-3(u-9)

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Solution for 6u-9=-3(u-9) equation: 



6u-9=-3(u-9)

We move all terms to the left:

6u-9-(-3(u-9))=0



We calculate terms in parentheses: -(-3(u-9)), so:

-3(u-9)

We multiply parentheses

-3u+27

Back to the equation:

-(-3u+27)



We get rid of parentheses

6u+3u-27-9=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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