Răspuns:
6 pf.... 8 pm....86 pct /*8
8 pf.... 6 pm....82 pct /*6
48 pf... 64 pm... 688 pct
48 pf... 36 pm... 492 pct
64-36=688-492
28 pm= 196 pct
196:28=7 pct/ o pm
6 pf... 8*7....86 pct
6 pf = 86-(8*7)=86-56= 30 pct
30:6= 5pct/ o pf
Verificare: 6*5+8*7=30+56=86
8*5+6*7=40+42=82