Question

1.Ana si Bogdan au impreuna 7 mere,iar Ana si Calin au impreuna 8 mere .Determinati cate mere are Ana,stiind ca,impreuna,cei tre copii au 12 mere.

Answer 1

a+b=7
a+c=8

a+b+c=12
c=12-7
c=5

a=8-5
a=3

b=7-3
b=4

Answer 2

7+8=15

15-12=3 MERE ARE ANA