Răspuns :
9f + 6z = 39 | * 3
8f + 18z = 60
27f + 18z = 117
8f + 18z = 60
le scadem
19f / = 57
f = 57 : 19
f = 3 kg punga cu faina
8 * 3 + 18z = 60
18z = 60 - 24
z = 36 : 18
z = 2 kg punga cu zahar
8f + 18z = 60
27f + 18z = 117
8f + 18z = 60
le scadem
19f / = 57
f = 57 : 19
f = 3 kg punga cu faina
8 * 3 + 18z = 60
18z = 60 - 24
z = 36 : 18
z = 2 kg punga cu zahar
9f+6z=39 | *(-3)
8f+18z=60
-27f-18z=-117
8f+18z=60
----------------------
-19f. / =-57
f=3kg
9*3+6z=39
27+6z=39
6z=12
z=2kg
8f+18z=60
-27f-18z=-117
8f+18z=60
----------------------
-19f. / =-57
f=3kg
9*3+6z=39
27+6z=39
6z=12
z=2kg