2/(r+4)=4/r

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Solution for 2/(r+4)=4/r equation: 



2/(r+4)=4/r

We move all terms to the left:

2/(r+4)-(4/r)=0



Domain of the equation: (r+4)!=0

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

r!=-4

r∈R





Domain of the equation: r)!=0

r!=0/1

r!=0

r∈R



We add all the numbers together, and all the variables

2/(r+4)-(+4/r)=0

We get rid of parentheses

2/(r+4)-4/r=0

We calculate fractions


2r/(r^2+4r)+(-4r-16)/(r^2+4r)=0

We multiply all the terms by the denominator


2r+(-4r-16)=0

We get rid of parentheses

2r-4r-16=0

We add all the numbers together, and all the variables

-2r-16=0

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

-2r=16

r=16/-2

r=-8

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