-77=-7(u+8)

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Solution for -77=-7(u+8) equation: 



-77=-7(u+8)

We move all terms to the left:

-77-(-7(u+8))=0



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

-7(u+8)

We multiply parentheses

-7u-56

Back to the equation:

-(-7u-56)



We get rid of parentheses

7u+56-77=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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