9/y+7=8/y-8

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Solution for 9/y+7=8/y-8 equation: 


D( y )

y = 0

y = 0

y = 0

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

9/y+7 = 8/y-8 // - 8/y-8

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

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

1*y^-1 = -15 // : 1

y^-1 = -15

-1 < 0

1/(y^1) = -15 // * y^1

1 = -15*y^1 // : -15

-1/15 = y^1

y = -1/15

y = -1/15

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