4=-(u-7)

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



4=-(u-7)

We move all terms to the left:

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



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

-(u-7)

We get rid of parentheses

-u+7

We add all the numbers together, and all the variables

-1u+7

Back to the equation:

-(-1u+7)



We get rid of parentheses

1u-7+4=0

We add all the numbers together, and all the variables

u-3=0

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

u=3

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