-7=4/u+3

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Solution for -7=4/u+3 equation: 



-7=4/u+3

We move all terms to the left:

-7-(4/u+3)=0



Domain of the equation: u+3)!=0

u∈R



We get rid of parentheses

-4/u-3-7=0

We multiply all the terms by the denominator


-3*u-7*u-4=0

We add all the numbers together, and all the variables

-10u-4=0

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

-10u=4

u=4/-10

u=-2/5

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