5/(7x+7)+7/(-7-7x)

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Solution for 5/(7x+7)+7/(-7-7x) equation: 


D( x )

-(7*x)-7 = 0

7*x+7 = 0

-(7*x)-7 = 0

-(7*x)-7 = 0

-7*x-7 = 0

-7*x-7 = 0 // + 7

-7*x = 7 // : -7

x = 7/(-7)

x = -1

7*x+7 = 0

7*x+7 = 0

7*x+7 = 0 // - 7

7*x = -7 // : 7

x = -7/7

x = -1

x in (-oo:-1) U (-1:+oo)

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

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

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

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

14*x+14 = 0

(14*x+14)/((7*x+7)*(-7*x-7)) = 0

(14*x+14)/((7*x+7)*(-7*x-7)) = 0 // * (7*x+7)*(-7*x-7)

14*x+14 = 0

14*x+14 = 0 // - 14

14*x = -14 // : 14

x = -14/14

x = -1

x in { -1} 

x belongs to the empty set

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