Răspuns:
V + C + F = 424 timbre
V÷ F= 4 rest 5 》 V = F ×4 +5
C: F/2 = 3 rest 16 》 C = F / 2 ×3 +16
înlocuim
Fx4 +5 +F /2 ×3 +16 + F = 424
4F +5 +3F/2 +16+F = 424
5F +3F / 2 + 21= 424 ( aducem la același numitor)
10 F + 3F + 42 = 848
13 F = 806
F = 806 ÷13
F =62
V = 62×4+5 》 V = 253
C = (62÷2)×3 +16 》 C= 31×3 +16= 109
verificare: 62+253+109=424