9=-8u+5(u+3)

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Solution for 9=-8u+5(u+3) equation: 



9=-8u+5(u+3)

We move all terms to the left:

9-(-8u+5(u+3))=0



We calculate terms in parentheses: -(-8u+5(u+3)), so:

-8u+5(u+3)

We multiply parentheses

-8u+5u+15

We add all the numbers together, and all the variables

-3u+15

Back to the equation:

-(-3u+15)



We get rid of parentheses

3u-15+9=0

We add all the numbers together, and all the variables

3u-6=0

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

3u=6

u=6/3

u=2

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