Răspunsuri

2014-11-03T19:55:19+02:00
10x+y=54+10y+x
10(x-y)-(x-y)=54
9(x-y)=54 ⇒ x-y=6 cu x si y nenule
(x,y)∈{(7,1), (8, 2), (9, 3)}
xy∈ {71,82,93}
Multumesc mult
dar ce inseamna nenula ?
adica de ce ai pus ?