2 Masinute + 1 Minge = 120 lei
1 Masinuta + 2 Mingi = 105 lei
2 Masinute + 1 Minge + 1 Masinuta + 2 Mingi = 120 +105 lei
3 Masinute + 3 Mingi = 225 lei
3*( Masinute + Mingi ) = 225
Masinute + Mingi =75 lei
120 - 75 = 45 lei Masinuta
75-45 = 30 lei Minge