8u-9=3(u+7)

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Solution for 8u-9=3(u+7) equation: 



8u-9=3(u+7)

We move all terms to the left:

8u-9-(3(u+7))=0



We calculate terms in parentheses: -(3(u+7)), so:

3(u+7)

We multiply parentheses

3u+21

Back to the equation:

-(3u+21)



We get rid of parentheses

8u-3u-21-9=0

We add all the numbers together, and all the variables

5u-30=0

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

5u=30

u=30/5

u=6

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