Question

alin, dan si vlad au 67 de timbre.impartind nr timbrelor lui alin la nr timbrelor lui dan obtinem catul 5 si restul 3.cate timbre are fiecare daca dan are jumatate din nr timbrelor lui vlad?

Answer 1

A+D+V = 67 timbre
A : D = 5 rest 3
A = 5×D+3
D = V:2 => V = 2×D
A |___|___|___|___|___|+3
D |___|
V |___|___|

Avem 8 segmente egale +3 = 67
67 - 3 = 64
64 :8 = 8 ( un segment)
A = 5×8+3 = 40+3 = 43
D = 8
V = 8×2 = 16

Verificare:
43+8+16 = 67

Alin are 43 timbre
Dan are 8 timbre
Vlad are 16 timbre

Answer 2

A=5D+3
V=2D
D+2D+5D+3=67
8D+3=67
8D=67-3=64
D=64:8=8
V=8X2=16
A=8X5+3=43