(5/(x+2))+(2/(x+7))=0

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Solution for (5/(x+2))+(2/(x+7))=0 equation: 


D( x )

x+7 = 0

x+2 = 0

x+7 = 0

x+7 = 0

x+7 = 0 // - 7

x = -7

x+2 = 0

x+2 = 0

x+2 = 0 // - 2

x = -2

x in (-oo:-7) U (-7:-2) U (-2:+oo)

5/(x+2)+2/(x+7) = 0

(5*(x+7))/((x+2)*(x+7))+(2*(x+2))/((x+2)*(x+7)) = 0

5*(x+7)+2*(x+2) = 0

7*x+39 = 0

(7*x+39)/((x+2)*(x+7)) = 0

(7*x+39)/((x+2)*(x+7)) = 0 // * (x+2)*(x+7)

7*x+39 = 0

7*x+39 = 0 // - 39

7*x = -39 // : 7

x = -39/7

x = -39/7

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