Question

Gadeste numerele naturale x,y si z stiind ca: x+y+z=7000 y+z=4280 y=x+520

Answer 1

x+y+z=7000

y+z=4280

y=x+520⇒x=y-250;

y-250+4280=7000

y+4030=7000

y=7000-4030

y=2970;

z=4280-2970=1310;

x=2970-520=2450.

Bafta!