Răspunsuri

2014-06-09T14:51:14+03:00
X-nr de bani primiti de Sabina
y-nr de bani primiti de Costi
z-nr de bani primiti de Darius

x+y+z=90
x=3y
z=5y

3y+y+5y=90
9y=90
y=10
x=3*10=30
z=5*10=50
1 5 1