-12=-7u+3(u+8)

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Solution for -12=-7u+3(u+8) equation: 



-12=-7u+3(u+8)

We move all terms to the left:

-12-(-7u+3(u+8))=0



We calculate terms in parentheses: -(-7u+3(u+8)), so:

-7u+3(u+8)

We multiply parentheses

-7u+3u+24

We add all the numbers together, and all the variables

-4u+24

Back to the equation:

-(-4u+24)



We get rid of parentheses

4u-24-12=0

We add all the numbers together, and all the variables

4u-36=0

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

4u=36

u=36/4

u=9

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