Question

Gaseste numerele naturalex,y si z stind ca x+y+z=7000 y+z=4280 y=x+520 ma puteti ajuta

Answer 1

x+y+z=7000, y+z=4280, inlocuim in prima relatie ⇒x+4280=7000,

x=7000-4280=2720, y=x+520=2720+520=3240, z=4280-y=4280-3240=1040

verificare 2720+3240+1040=7000

Answer 2

scadem din prima ecuatie pe a doua

x+y+z=7000

  -y-z=-4280

x =2720

inlocuim in a treia ec

y=2720+520=3240

aflam z inlocuind in ec 2

z=4280-3240= 1040