(-2)/(x+7)-(3)/(x+9)

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Solution for (-2)/(x+7)-(3)/(x+9) equation: 


D( x )

x+7 = 0

x+9 = 0

x+7 = 0

x+7 = 0

x+7 = 0 // - 7

x = -7

x+9 = 0

x+9 = 0

x+9 = 0 // - 9

x = -9

x in (-oo:-9) U (-9:-7) U (-7:+oo)

-2/(x+7)-(3/(x+9)) = 0

-2/(x+7)-3*(x+9)^-1 = 0

-2/(x+7)-3/(x+9) = 0

(-2*(x+9))/((x+7)*(x+9))+(-3*(x+7))/((x+7)*(x+9)) = 0

-2*(x+9)-3*(x+7) = 0

-5*x-39 = 0

(-5*x-39)/((x+7)*(x+9)) = 0

(-5*x-39)/((x+7)*(x+9)) = 0 // * (x+7)*(x+9)

-5*x-39 = 0

-5*x-39 = 0 // + 39

-5*x = 39 // : -5

x = 39/(-5)

x = -39/5

x = -39/5

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