Question

Ema,Victor si Daria au folosit pentru un experiment 217 cuburi de gheata.Ema si Victor au folosit 158 de cuburi,iar Victor si Daria 144 de cuburi. Cate cuburi a folosit fiecare copil?(Rezolva in doua moduri.)

Answer 1

MOD1
E+V+D=217
E+V=158
V+D=144
E=(E+V+D)-(V+D)=217-144
E=73
V=158-73
V=85
D=144-85
D=59

MOD2
D=217-158
D=59
V=144-59
V=85
E=158-85
E=73