Question

Ana si Dan au impreuna 80 de nuci. Daca Ana ii lui Dan 10 nuci, atunci ei vor avea acelasi numar de nuci. Cate nuci vor avea fiecare?

Answer 1

a+b=80
a=b+10
a=40
b=40

Answer 2

A + D = 80
A - 10 = D + 10
A = D + 20
D + 20 + D = 80
2D = 80 - 20
D = 60 : 2
D = 30 nuci a avut la inceput
D = 30 + 10 = 40 nuci are acum
A = 80 - 30
A = 50 nuci a avut la inceput
A = 50 - 10 = 40 nuci are acum