Question

doua masinute si o minge costa 120 de lei.O masinuta si 2 mingi costa 105 lei. Cat costa o masinuta si cat costa o minge

Answer 1

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