7/r=1/r-3

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Solution for 7/r=1/r-3 equation: 



7/r=1/r-3

We move all terms to the left:

7/r-(1/r-3)=0



Domain of the equation: r!=0

r∈R





Domain of the equation: r-3)!=0

r∈R



We get rid of parentheses

7/r-1/r+3=0

We multiply all the terms by the denominator


3*r+7-1=0

We add all the numbers together, and all the variables

3r+6=0

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

3r=-6

r=-6/3

r=-2

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