-7=7(u-4)

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



-7=7(u-4)

We move all terms to the left:

-7-(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+28-7=0

We add all the numbers together, and all the variables

-7u+21=0

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

-7u=-21

u=-21/-7

u=+3

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