Daca x+y+z=17 , calculati :

b. 13×X+13×Y+13×Z-1313=...

c. 882-3×(7×X+7×Y+7×Z)=.....


Răspuns :

[tex]b)~13x+13y+13z-1313=13(x+y+z)=13 \cdot 17-1313= \\ \\ =221-1313=-1092. \\ \\ c)882-3(7x+7y+7z)= \\ \\ =882-21(x+y+z)= \\ \\ =882- 21 \cdot 17= \\ \\ =882-357= \\ \\ =525.[/tex]