40/r=5

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Solution for 40/r=5 equation: 



40/r=5

We move all terms to the left:

40/r-(5)=0



Domain of the equation: r!=0

r∈R



We multiply all the terms by the denominator


-5*r+40=0

We add all the numbers together, and all the variables

-5r+40=0

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

-5r=-40

r=-40/-5

r=+8

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