2/5r=4

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Solution for 2/5r=4 equation: 



2/5r=4

We move all terms to the left:

2/5r-(4)=0



Domain of the equation: 5r!=0

r!=0/5

r!=0

r∈R



We multiply all the terms by the denominator


-4*5r+2=0

Wy multiply elements

-20r+2=0

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

-20r=-2

r=-2/-20

r=1/10

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