-3u+21=6(u+8)

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Solution for -3u+21=6(u+8) equation: 



-3u+21=6(u+8)

We move all terms to the left:

-3u+21-(6(u+8))=0



We calculate terms in parentheses: -(6(u+8)), so:

6(u+8)

We multiply parentheses

6u+48

Back to the equation:

-(6u+48)



We get rid of parentheses

-3u-6u-48+21=0

We add all the numbers together, and all the variables

-9u-27=0

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

-9u=27

u=27/-9

u=-3

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