9u-15=-7(u+9)

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Solution for 9u-15=-7(u+9) equation: 



9u-15=-7(u+9)

We move all terms to the left:

9u-15-(-7(u+9))=0



We calculate terms in parentheses: -(-7(u+9)), so:

-7(u+9)

We multiply parentheses

-7u-63

Back to the equation:

-(-7u-63)



We get rid of parentheses

9u+7u+63-15=0

We add all the numbers together, and all the variables

16u+48=0

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

16u=-48

u=-48/16

u=-3

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