Răspunsuri

2014-06-25T11:12:39+03:00
1.Daca x+y+z=17,calculati
a) 5•x+5•y+5•z=
5(x+y+z)=
5*17 = 85

b)13•x+13•y+13•z-1313=
13 (x+y+z)-1313=
13*17-1313=
221-1313=
-1092  -  aici nu cred ca e -1313, dar asa ai scris, asa fac

c)882-3•(7•x+7•y+7•z)=
882-3( 7(x+y+z) )=
882-3(7*17)=
882-3*119=
882-357=
525
28 4 28
2014-06-25T12:26:36+03:00
5xx+5xy+5xz=
5(x+y+z)=
5x17 = 85

(x= inmultire)

5 2 5