3u-12=9(u+4)

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Solution for 3u-12=9(u+4) equation: 



3u-12=9(u+4)

We move all terms to the left:

3u-12-(9(u+4))=0



We calculate terms in parentheses: -(9(u+4)), so:

9(u+4)

We multiply parentheses

9u+36

Back to the equation:

-(9u+36)



We get rid of parentheses

3u-9u-36-12=0

We add all the numbers together, and all the variables

-6u-48=0

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

-6u=48

u=48/-6

u=-8

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