6/(b-1)=9/7

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Solution for 6/(b-1)=9/7 equation: 


D( b )

b-1 = 0

b-1 = 0

b-1 = 0

b-1 = 0 // + 1

b = 1

b in (-oo:1) U (1:+oo)

6/(b-1) = 9/7 // - 9/7

6/(b-1)-(9/7) = 0

6/(b-1)-9/7 = 0

(6*7)/(7*(b-1))+(-9*(b-1))/(7*(b-1)) = 0

6*7-9*(b-1) = 0

51-9*b = 0

(51-9*b)/(7*(b-1)) = 0

(51-9*b)/(7*(b-1)) = 0 // * 7*(b-1)

51-9*b = 0

51-9*b = 0 // - 51

-9*b = -51 // : -9

b = -51/(-9)

b = 17/3

b = 17/3

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