-1=3/u

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Solution for -1=3/u equation: 



-1=3/u

We move all terms to the left:

-1-(3/u)=0



Domain of the equation: u)!=0

u!=0/1

u!=0

u∈R



We add all the numbers together, and all the variables

-(+3/u)-1=0

We get rid of parentheses

-3/u-1=0

We multiply all the terms by the denominator


-1*u-3=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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