8/y+7=5/y

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Solution for 8/y+7=5/y equation: 


D( y )

y = 0

y = 0

y = 0

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

8/y+7 = 5/y // - 5/y

8/y-(5/y)+7 = 0

8/y-5*y^-1+7 = 0

3*y^-1 = -7 // : 3

y^-1 = -7/3

-1 < 0

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

1 = -7/3*y^1 // : -7/3

-3/7 = y^1

y = -3/7

y = -3/7

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