exista numerele naturale x,y,z care verifics egalitatile x-y=5;y-z=7; z-x=3
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x-y=5 y-z=7 z-x=3
x=20,19,18,17,16,15,14,13,12,11,10,9,8,7,5
y= 15,14,13,12,11,10,9,8, 7,6,5,4,3,2,0
z=23,22,21,20,19,18,17,15,14,13,12,11,10,3
x=20,19,18,17,16,15,14,13,12,11,10,9,8,7,5
y= 15,14,13,12,11,10,9,8, 7,6,5,4,3,2,0
z=23,22,21,20,19,18,17,15,14,13,12,11,10,3
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