Question

Diana, Stefan, Maia isi prezinta colectia de monede. Cate monede au fiecare copil, stiind ca Diana si Stefan au 50 monede, Diana si Maia au 58 moende , Stefan si Maia au 56 mondede? AJUTATI-MAAAAA

Answer 1

d+s= 50
d+m= 58
s+m=56
Facem suma relatiilor, apoi impartim la 2.
(d+s+d+m+s+m):2= (50+58+56):2= 164:2= 82=>
d+s+m=82
Alegem 2 relatii din primele trei + suma celor trei.
d+s+m= 82
d+s=50
s+m=56
m= 82-50= 32
d= 82-56= 26
s= 50-26= 24