9/b-4=4/7

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Solution for 9/b-4=4/7 equation: 


D( b )

b = 0

b = 0

b = 0

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

9/b-4 = 4/7 // - 4/7

9/b-(4/7)-4 = 0

9/b-4/7-4 = 0

9*b^-1 = 32/7 // : 9

b^-1 = 32/63

-1 < 0

1/(b^1) = 32/63 // * b^1

1 = 32/63*b^1 // : 32/63

63/32 = b^1

b = 63/32

b = 63/32

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