-42=-7(u+4)

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Solution for -42=-7(u+4) equation: 



-42=-7(u+4)

We move all terms to the left:

-42-(-7(u+4))=0



We calculate terms in parentheses: -(-7(u+4)), so:

-7(u+4)

We multiply parentheses

-7u-28

Back to the equation:

-(-7u-28)



We get rid of parentheses

7u+28-42=0

We add all the numbers together, and all the variables

7u-14=0

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

7u=14

u=14/7

u=2

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