3carti + 4pixuri = 50lei
2carti + 2pixuri = 30lei (amplificam cu 2)
4carti + 4pixuri = 60lei
4c - 3c = 1c
4p - 4p = 0p
60lei - 50lei = 10lei
1c + 0p = 10lei
1c = 10lei
3c = 10•3
3c = 30lei
3carti + 4pixuri = 50lei
30lei + 4p = 50lei
4p = 50-30
4p = 20lei
1p = 20:4
1p = 5
2p = 10lei
Răspuns: 3 carti = 30lei
2 pixuri = 10lei
Sper ca te-am ajutat