3/x+4/(x+5)

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Solution for 3/x+4/(x+5) equation: 


D( x )

x+5 = 0

x = 0

x+5 = 0

x+5 = 0

x+5 = 0 // - 5

x = -5

x = 0

x = 0

x in (-oo:-5) U (-5:0) U (0:+oo)

4/(x+5)+3/x = 0

(4*x)/(x*(x+5))+(3*(x+5))/(x*(x+5)) = 0

3*(x+5)+4*x = 0

7*x+15 = 0

(7*x+15)/(x*(x+5)) = 0

(7*x+15)/(x*(x+5)) = 0 // * x*(x+5)

7*x+15 = 0

7*x+15 = 0 // - 15

7*x = -15 // : 7

x = -15/7

x = -15/7

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