Răspuns :
3C+4P =2.267
4C+4P =2.372 l -
--------------------------
C =0.105 kg
3*0.105 +4P =2,267
0.315+4P = 2.267
4P =2.267-0.315 =1.952
P =0.488 kg
4C+4P =2.372 l -
--------------------------
C =0.105 kg
3*0.105 +4P =2,267
0.315+4P = 2.267
4P =2.267-0.315 =1.952
P =0.488 kg
Metoda comparatiei
3 covrigi ...............4 paini ............2,267 kg
4 covrigi ...............4 paini ............2,372 kg
.........................................................................
1 covrig .................../ ....................0,105 kg
4 paini: 2,372 - 4×0,105=2,372-0,420=1,952 (kg)
1 paine: 1,952:4=0,488 kg
R. 0,488 lei/paine
3 covrigi ...............4 paini ............2,267 kg
4 covrigi ...............4 paini ............2,372 kg
.........................................................................
1 covrig .................../ ....................0,105 kg
4 paini: 2,372 - 4×0,105=2,372-0,420=1,952 (kg)
1 paine: 1,952:4=0,488 kg
R. 0,488 lei/paine