81=9r/9

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Solution for 81=9r/9 equation: 



81=9r/9

We move all terms to the left:

81-(9r/9)=0

We add all the numbers together, and all the variables

-(+9r/9)+81=0

We get rid of parentheses

-9r/9+81=0

We multiply all the terms by the denominator


-9r+81*9=0

We add all the numbers together, and all the variables

-9r+729=0

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

-9r=-729

r=-729/-9

r=+81

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