3=12+8/r

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Solution for 3=12+8/r equation: 



3=12+8/r

We move all terms to the left:

3-(12+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+12)+3=0

We get rid of parentheses

-8/r-12+3=0

We multiply all the terms by the denominator


-12*r+3*r-8=0

We add all the numbers together, and all the variables

-9r-8=0

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

-9r=8

r=8/-9

r=-8/9

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