Răspuns:
3 mingi..............4 masinute.................146 ron
3 mingi..............7 masinute................224 ron
Facem scaderea celor doua propozitii
3 masinute= 224-146= 78ron => o masinuta=26 ron
Aflam cat costa o minge, inlocuind
3 mingi..............4*26 ron......................146 ron=>
3 mingi= 146- 4*26 =>
3 mingi= 146-104=>
3 mingi=42 ron=>
O minge= 14ron
Sper ca te-am ajutat c:
*p.s: imi apui daca nu ai inteles ceva*
