(2x-7)/(x+9)

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Solution for (2x-7)/(x+9) equation: 


D( x )

x+9 = 0

x+9 = 0

x+9 = 0

x+9 = 0 // - 9

x = -9

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

(2*x-7)/(x+9) = 0

2*x-7 = 0 // + 7

2*x = 7 // : 2

x = 7/2

x = 7/2

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