(6/x)+(4/(x+7))

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Solution for (6/x)+(4/(x+7)) equation: 


D( x )

x+7 = 0

x = 0

x+7 = 0

x+7 = 0

x+7 = 0 // - 7

x = -7

x = 0

x = 0

x in (-oo:-7) U (-7:0) U (0:+oo)

4/(x+7)+6/x = 0

(4*x)/(x*(x+7))+(6*(x+7))/(x*(x+7)) = 0

6*(x+7)+4*x = 0

10*x+42 = 0

(10*x+42)/(x*(x+7)) = 0

(10*x+42)/(x*(x+7)) = 0 // * x*(x+7)

10*x+42 = 0

10*x+42 = 0 // - 42

10*x = -42 // : 10

x = -42/10

x = -21/5

x = -21/5

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