Hi, im just wondering how someone can best manually, (without solver), mathematically start finding some what accurate betting frequencies, (whether for value or bluffs balance etc)

Mighy it go something like " Opponent I believe has 50 combos of bluffs he will bet on river if I check and 50 he will value bet so I need to check\call 50% of my value hands and lead the other 50% of value hands (I lead turn in this particular made up "example).

This is a rough simplification but wondering basically if this is how its done, based on math