(5x-15)/(3x+9)

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Solution for (5x-15)/(3x+9) equation: 


D( x )

3*x+9 = 0

3*x+9 = 0

3*x+9 = 0

3*x+9 = 0 // - 9

3*x = -9 // : 3

x = -9/3

x = -3

x in (-oo:-3) U (-3:+oo)

(5*x-15)/(3*x+9) = 0

5*x-15 = 0 // + 15

5*x = 15 // : 5

x = 15/5

x = 3

x = 3

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