Răspunsuri

2014-05-02T12:23:47+03:00
X-nr bancnotelor de 5 lei
y-nr bancnotelor de 10 lei

x+y=28  |-5
5x+10y=200

-5x-5y=-140
5x+10y=200

/5y=60
y=12
x=16
2 5 2