I ---4/10 II--- 6/10
I ----2/11 II------9/11
4/10*x+6/10*y=2/11*x+9/11*y
Amplific cu 11 in stanga si cu 10 in dreapta
44x/110+66y/110=20x/110+90y/110
renunt la numitor
44x+66y=20x+90y
44x-22x=90y-66y
22x=24y
In 22 zile prima echipa si in 24 a doua echipa