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Daca x+y=8 si y+2z=35,calculati :
5x+13y+16z


Răspuns :

5x+13y+16z=5x+5y+8y+16z=5(x+y)+8(y+2z)=5*8+8*35=40+280=320
5x+13y+16z=5x+5y+8y+16z=5(x+y)+8(y+2z)=5*8+8*35=40+280=320