15/9=20/w

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Solution for 15/9=20/w equation: 


D( w )

w = 0

w = 0

w = 0

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

15/9 = 20/w // - 20/w

15/9-(20/w) = 0

15/9-20*w^-1 = 0

-20*w^-1 = -5/3 // : -20

w^-1 = 1/12

-1 < 0

1/(w^1) = 1/12 // * w^1

1 = 1/12*w^1 // : 1/12

12 = w^1

w = 12

w = 12

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