not sure i understand.
so for each fraction you do the same?
so like 1/a = 1/a * bc/bc = bc/abc
then 1/b = 1/b * ac/ac = ac/abc
and 1/c = 1/c * ab/ab = ab/abc
ok it does make more sense but im still confused as to where bc/bc appeared from :/
worse part is i know this is like primary school stuff and i im goin uni doing maths next year :|
Now, and you can multiply any number by 1 without changing its value.
What I've done is to make appear the common factor between a,b and c, that is to say abc, because and it's only when you have a common denominator that you can add up the fractions.