Originally posted by Lunitis
Sorry i didnt express myself well
And giving a range to villain (that continues) we see that our equity is 53.2%, but we are beating less than 50% of the combos.
Im already assuming that this is his calling/raising range. I already set apart the folding combos.
I think I understand now 
The key thing here is the equity not the amount of combos. I.e to say villain must call us with a worse hand 50% of the time or more is actually misleading from this perspective. I.e what really matters is that the equity of villains calling range is lower than 50% vs you in order for a value bet to be profitable.
I.e to illustrate, villain has 3hands and will call with all 3. 2 of them have 51% equity vs us and are favourites, and one is drawing stone cold dead. Villain actually has more combos of hands that are favourite against us but hopefully you can see it's a clear value bet.
However just because you will get called by worse doesn't mean value betting is necessarily the best option. Villain may bluff with a much wider range than he calls with. Also you don't need to be a favourite vs villains range to bluffcatch because the money in the pot is taken into consideration. When you are value betting the money already in the pot is irrelevant.
Thanks, I realise now that to be 100% correct I should not say----->
Originally posted by w34z3l
We cbet for value because the range that calls us contains worse hands 50% of the time or more.
unless we are specifically on the river.
For other streets I should say "We cbet for value because the range calls us has less than 50% equity vs us". In most cases these will be the same, but not always as your example points out.