Răspunsuri

2014-05-19T08:09:23+03:00
1C = 3c
4C + 18c = 150lei, inlocuim 4C cu 4 * 3c si obtinem:
12c + 18c = 150lei
30c = 150lei
1c = 150/30 = 5lei
1C = 3c ⇒ 1C = 3 * 5 = 15lei