4/5r=9

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Solution for 4/5r=9 equation: 



4/5r=9

We move all terms to the left:

4/5r-(9)=0



Domain of the equation: 5r!=0

r!=0/5

r!=0

r∈R



We multiply all the terms by the denominator


-9*5r+4=0

Wy multiply elements

-45r+4=0

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

-45r=-4

r=-4/-45

r=4/45

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