-9u+15=-3(u+9)

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Solution for -9u+15=-3(u+9) equation: 



-9u+15=-3(u+9)

We move all terms to the left:

-9u+15-(-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

-9u+3u+27+15=0

We add all the numbers together, and all the variables

-6u+42=0

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

-6u=-42

u=-42/-6

u=+7

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