-4=12/r

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Solution for -4=12/r equation: 



-4=12/r

We move all terms to the left:

-4-(12/r)=0



Domain of the equation: r)!=0

r!=0/1

r!=0

r∈R



We add all the numbers together, and all the variables

-(+12/r)-4=0

We get rid of parentheses

-12/r-4=0

We multiply all the terms by the denominator


-4*r-12=0

We add all the numbers together, and all the variables

-4r-12=0

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

-4r=12

r=12/-4

r=-3

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