Răspunsuri

2014-04-27T22:51:55+03:00
X-nr bancnotelor de 100lei
y-nr bancnotelor de 500lei
x+y=16  |-100
100x+500y=3600

-100x-100y=-1600
100x+500y=3600

/400y=2000
y=5  x=11
de unde y = 5? si de unde x=11?
prin adunarea celor 2 ecuatii si x=16-y=16-5