21/r=6/6

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Solution for 21/r=6/6 equation: 



21/r=6/6

We move all terms to the left:

21/r-(6/6)=0



Domain of the equation: r!=0

r∈R



We add all the numbers together, and all the variables

21/r-1=0

We multiply all the terms by the denominator


-1*r+21=0

We add all the numbers together, and all the variables

-1r+21=0

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

-r=-21

r=-21/-1

r=+21

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