Răspunsuri

2014-03-06T17:38:33+02:00
Notam c-caiete
30c=45
c=45/30=1,5
8c=8x1,5=12
2014-03-06T17:38:53+02:00
30 caiete............45
8 caiete..........x

x=(45x8)/30
x=360/30
x=12 lei