7=5/v-4

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Solution for 7=5/v-4 equation: 


D( v )

v = 0

v = 0

v = 0

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

7 = 5/v-4 // - 5/v-4

4-(5/v)+7 = 0

4-5*v^-1+7 = 0

-5*v^-1 = -11 // : -5

v^-1 = 11/5

-1 < 0

1/(v^1) = 11/5 // * v^1

1 = 11/5*v^1 // : 11/5

5/11 = v^1

v = 5/11

v = 5/11

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