1/a + 1/b + 1/x= 1/(a+b+c)

Dear Student,

The correct question will be $\frac{1}{a}+\frac{1}{b}+\frac{1}{x} = \frac{1}{a+b+x}$, if this is your question then refer the link for the answer: 
https://www.meritnation.com/ask-answer/question/1-a-b-x-1-a-1-b-1-x-find-the-value-of-x/quadratic-equations/3223585

Regards