-19=-7u+3(u+7)

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Solution for -19=-7u+3(u+7) equation: 



-19=-7u+3(u+7)

We move all terms to the left:

-19-(-7u+3(u+7))=0



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

-7u+3(u+7)

We multiply parentheses

-7u+3u+21

We add all the numbers together, and all the variables

-4u+21

Back to the equation:

-(-4u+21)



We get rid of parentheses

4u-21-19=0

We add all the numbers together, and all the variables

4u-40=0

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

4u=40

u=40/4

u=10

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