-3=5/u+7

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Solution for -3=5/u+7 equation: 



-3=5/u+7

We move all terms to the left:

-3-(5/u+7)=0



Domain of the equation: u+7)!=0

u∈R



We get rid of parentheses

-5/u-7-3=0

We multiply all the terms by the denominator


-7*u-3*u-5=0

We add all the numbers together, and all the variables

-10u-5=0

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

-10u=5

u=5/-10

u=-1/2

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