7=(u+4)

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Solution for 7=(u+4) equation: 



7=(u+4)

We move all terms to the left:

7-((u+4))=0



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

(u+4)

We get rid of parentheses

u+4

Back to the equation:

-(u+4)



We get rid of parentheses

-u-4+7=0

We add all the numbers together, and all the variables

-1u+3=0

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

-u=-3

u=-3/-1

u=+3

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