Please help and show steps i am very confused...

Question

Determine a+b+c 25/84=1/a+1/ab+1/abc

Answer 1

First of all, you meant to say:
Determine a+b+c
if 25/84=1/a+1/ab+1/abc

Bosnian did not research on this and you might want to look at this

https://www.jiskha.com/display.cgi?id=1512455112

Answer 2

I still don't get it