(-4x-9)/(-9x+7)

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Solution for (-4x-9)/(-9x+7) equation: 


D( x )

7-9*x = 0

7-9*x = 0

7-9*x = 0

7-9*x = 0 // - 7

-9*x = -7 // : -9

x = -7/(-9)

x = 7/9

x in (-oo:7/9) U (7/9:+oo)

(-4*x-9)/(7-9*x) = 0

-4*x-9 = 0 // + 9

-4*x = 9 // : -4

x = 9/(-4)

x = -9/4

x = -9/4

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