9=90/r

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Solution for 9=90/r equation: 



9=90/r

We move all terms to the left:

9-(90/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

-(+90/r)+9=0

We get rid of parentheses

-90/r+9=0

We multiply all the terms by the denominator


9*r-90=0

We add all the numbers together, and all the variables

9r-90=0

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

9r=90

r=90/9

r=10

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