How do you solve 3-20 in the big quadrilateral puzzle?

Answer 1

m<8 = 18
m<9 = 115
m<10 = 50
m<11 = 82
m<12 = 100
m<13 = 97
m<14 = 93
m<15 = 75
m<16 = 35
m<17 = 17
m<18 = 32
m<19 = 14

Answer 2

Well, honey, to solve 3-20 in the big quadrilateral puzzle, you simply subtract 20 from 3. So, 3 minus 20 equals -17. Voila! Now go show that puzzle who's boss.