Question

EMA,Victor si Daria au folosit pentru un experiment 217 cuburi de gheata Ema si Victor au folosit 158 cuburi ,Victor si Daria144 de cuburi .Cate cuburi au folositfiecare copil

Answer 1

217-158=59 (cuburi a folosit Daria)
217-144=73 (cuburi a folosit Ema)
59+73= 132 (cuburi au folosit Daria si Ema)
217-132=85 (cuburi a folosit Victor)

V. 59+73+85=217

Answer 2

E=Ema;  V=Victor;  D=Daria
E+V+D=217
E+V=158
V+D=144
E=217-144
E=73
D=217-158
D=59
V=217-59-73
V=85
Rs:Ema=73 cuburi; Victor=85cuburi;  Daria=59 cuburi