7/(v+4)+9/(5v)

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Solution for 7/(v+4)+9/(5v) equation: 


D( v )

v+4 = 0

5*v = 0

v+4 = 0

v+4 = 0

v+4 = 0 // - 4

v = -4

5*v = 0

5*v = 0

5*v = 0 // : 5

v = 0

v in (-oo:-4) U (-4:0) U (0:+oo)

7/(v+4)+9/(5*v) = 0

(5*7*v)/(5*v*(v+4))+(9*(v+4))/(5*v*(v+4)) = 0

9*(v+4)+5*7*v = 0

44*v+36 = 0

(44*v+36)/(5*v*(v+4)) = 0

(44*v+36)/(5*v*(v+4)) = 0 // * 5*v*(v+4)

44*v+36 = 0

44*v+36 = 0 // - 36

44*v = -36 // : 44

v = -36/44

v = -9/11

v = -9/11

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