(7y/y+1)=3-(7/y+1)

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Solution for (7y/y+1)=3-(7/y+1) equation: 


D( y )

y = 0

y = 0

y = 0

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

(7*y)/y+1 = 3-(7/y)-1 // - 3-(7/y)-1

7/y+(7*y)/y-3+1+1 = 0

7*y^-1 = -6 // : 7

y^-1 = -6/7

-1 < 0

1/(y^1) = -6/7 // * y^1

1 = -6/7*y^1 // : -6/7

-7/6 = y^1

y = -7/6

y = -7/6

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