Question

Ema,Victor si Daria au folosit ptr. un experiment217 cuburi cu gheata.Ema si Victor au folosit 158 de cuburi,iar Victor si Daria au folosit 144 de cuburi.Cate cuburi a folosit fiecare copil?(rezolva in doua moduri)

Answer 1

E+V+D=217, rezulta, 158+D=217, deci D=217-158=59

E+V=158, deci, E+85=158, rezulta, E=158-85=73

V+D=144, rezulta 59+D=144, deci, V=144-59=85

verificare: 59+73+85=217