Răspuns :
d + v + a = 95
d + v = 75
v + a = 74
a = 95 - 75
a = 20
v = 74 - a
v = 74 - 20
v = 54
d = 75 - v
d = 75 - 54
d = 21
Răspuns:
d+v+a=95
75+a=95=>a=95-75=20 timbre are Aurel
d+74=95=>d=95-74=21 timbre are Dana
v=95-(20+21)=54 timbre are Vlad