4/5=12/y

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Solution for 4/5=12/y equation: 


D( y )

y = 0

y = 0

y = 0

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

4/5 = 12/y // - 12/y

4/5-(12/y) = 0

4/5-12*y^-1 = 0

-12*y^-1 = -4/5 // : -12

y^-1 = 1/15

-1 < 0

1/(y^1) = 1/15 // * y^1

1 = 1/15*y^1 // : 1/15

15 = y^1

y = 15

y = 15

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