ok, so the 38% is the minimum equity needed vs. villains 3bet calling range.

I can see where EV(3bet pre) > EV (flat pre) will come in very handy later on as my stats converge. it seems most of the villains at my stake tend to play a "set" style or they play predictably based on their stats.
so let me try it then.

same stats, 16.7/12.4,calls a 3bet 52%, F23B 39% , 4bet 9.1%.his fold to cbet is 72%
villain opens 4bb from BTN.

1= EV(3bet to 12)
2 = EV(fold pre)
3= EV (flat pre)
im going to use the EV=0 formula

1= 38.2% ( not going to retype it.)
2 = 0%
3 = EV(flat) = hmm..this seems complicated as well. how would this work, just use range vs. range? ex. villain opens 30% OTB.
ive wrote like 5 lines and keep deleting them. how would this work renton?