3u-12=-9(u-8)

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Solution for 3u-12=-9(u-8) equation: 



3u-12=-9(u-8)

We move all terms to the left:

3u-12-(-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

3u+9u-72-12=0

We add all the numbers together, and all the variables

12u-84=0

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

12u=84

u=84/12

u=7

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