(9-3y)/(1-9y)=8/5

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Solution for (9-3y)/(1-9y)=8/5 equation: 


D( y )

1-(9*y) = 0

1-(9*y) = 0

1-(9*y) = 0

1-9*y = 0

1-9*y = 0 // - 1

-9*y = -1 // : -9

y = -1/(-9)

y = 1/9

y in (-oo:1/9) U (1/9:+oo)

(9-(3*y))/(1-(9*y)) = 8/5 // - 8/5

(9-(3*y))/(1-(9*y))-(8/5) = 0

(9-3*y)/(1-9*y)-8/5 = 0

(5*(9-3*y))/(5*(1-9*y))+(-8*(1-9*y))/(5*(1-9*y)) = 0

5*(9-3*y)-8*(1-9*y) = 0

57*y+37 = 0

(57*y+37)/(5*(1-9*y)) = 0

(57*y+37)/(5*(1-9*y)) = 0 // * 5*(1-9*y)

57*y+37 = 0

57*y+37 = 0 // - 37

57*y = -37 // : 57

y = -37/57

y = -37/57

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