4/2=8/r

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Solution for 4/2=8/r equation: 



4/2=8/r

We move all terms to the left:

4/2-(8/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

-(+8/r)+4/2=0

We add all the numbers together, and all the variables

-(+8/r)+2=0

We get rid of parentheses

-8/r+2=0

We multiply all the terms by the denominator


2*r-8=0

We add all the numbers together, and all the variables

2r-8=0

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

2r=8

r=8/2

r=4

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