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Afla numerele x,y,z,stiind ca:
x + y =730
y + z =1170
x + z =940


Răspuns :

x + y =730; y + z =1170; x + z =940; 2(x+y+z)=730+1170+940=2840 x+y+z=2840/2=1420; z=1420-730=690; x=1420-1170=250; y=1420-940=480