9u-12=3(u+6)

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Solution for 9u-12=3(u+6) equation: 



9u-12=3(u+6)

We move all terms to the left:

9u-12-(3(u+6))=0



We calculate terms in parentheses: -(3(u+6)), so:

3(u+6)

We multiply parentheses

3u+18

Back to the equation:

-(3u+18)



We get rid of parentheses

9u-3u-18-12=0

We add all the numbers together, and all the variables

6u-30=0

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

6u=30

u=30/6

u=5

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