9/7=18/(2y-4)

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Solution for 9/7=18/(2y-4) equation: 


D( y )

2*y-4 = 0

2*y-4 = 0

2*y-4 = 0

2*y-4 = 0 // + 4

2*y = 4 // : 2

y = 4/2

y = 2

y in (-oo:2) U (2:+oo)

9/7 = 18/(2*y-4) // - 18/(2*y-4)

9/7-(18/(2*y-4)) = 0

9/7-18*(2*y-4)^-1 = 0

9/7-18/(2*y-4) = 0

(-18*7)/(7*(2*y-4))+(9*(2*y-4))/(7*(2*y-4)) = 0

9*(2*y-4)-18*7 = 0

18*y-162 = 0

(18*y-162)/(7*(2*y-4)) = 0

(18*y-162)/(7*(2*y-4)) = 0 // * 7*(2*y-4)

18*y-162 = 0

18*y-162 = 0 // + 162

18*y = 162 // : 18

y = 162/18

y = 9

y = 9

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