30/r=85/100

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Solution for 30/r=85/100 equation: 


D( r )

r = 0

r = 0

r = 0

r in (-oo:0) U (0:+oo)

30/r = 85/100 // - 85/100

30/r-(85/100) = 0

30/r-17/20 = 0

30*r^-1 = 17/20 // : 30

r^-1 = 17/600

-1 < 0

1/(r^1) = 17/600 // * r^1

1 = 17/600*r^1 // : 17/600

600/17 = r^1

r = 600/17

r = 600/17

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