100/r=20

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Solution for 100/r=20 equation: 



100/r=20

We move all terms to the left:

100/r-(20)=0



Domain of the equation: r!=0

r∈R



We multiply all the terms by the denominator


-20*r+100=0

We add all the numbers together, and all the variables

-20r+100=0

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

-20r=-100

r=-100/-20

r=+5

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