4/y=80/100

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Solution for 4/y=80/100 equation: 


D( y )

y = 0

y = 0

y = 0

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

4/y = 80/100 // - 80/100

4/y-(80/100) = 0

4/y-4/5 = 0

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

y^-1 = 1/5

-1 < 0

1/(y^1) = 1/5 // * y^1

1 = 1/5*y^1 // : 1/5

5 = y^1

y = 5

y = 5

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