Question

Ema .victor si daria au folosit impreuna pentru un experiment 217 cuburi .ema si victor au folosit 158 de cuburi iar victor si daria. 144 de cuburi
Care cuburi a folosit fiecare copil.(rezolva in doua moduri) si intrebarile va rog

Answer 1

e+v+d=217
e+v=158      e=158-v
v+d=144       d=144-v
158-v+v+144-v=217
-v=217-302
v=85 VICTOR
E=158-85=73 EMA
D=144-85=59 DARIA

Answer 2

E+V+D=217 cuburi     (Ema+Victor+Daria)
E+V=158 cuburi
V+D=144 cuburi
Cate cuburi a folosit Daria ?
158+D=217
D=217-158
D=59 cuburi a folosit Daria
Cate cuburi a folosit Ema ?
E+144=217
E=217-144
E=73 cuburi a folosit Ema
Cate cuburi a folosit Victor ?
73+V=158
V=158-73
V=85 cuburi a folosit Victor
V: 73+85+59=217 cuburi 
.........................................................
 mod.2
E+V+D=217
E+V=158
V+D=144
E+2V+D=158+144=302
V=302-217
V=85  Victor
E=158-85
E=73  Ema
D=144-85
D=59  Daria
V: 73+85+59=217