-9=4/r

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Solution for -9=4/r equation: 



-9=4/r

We move all terms to the left:

-9-(4/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

-(+4/r)-9=0

We get rid of parentheses

-4/r-9=0

We multiply all the terms by the denominator


-9*r-4=0

We add all the numbers together, and all the variables

-9r-4=0

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

-9r=4

r=4/-9

r=-4/9

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