Notam
r → baloane rosii
a → baloane albe
v → baloane verzi
r + a + v = 82
r + a = 65
a - r - v = 14
_____________
82 - 65 = 17 → baloane verzi
a - r - 17 = 14
a - r = 14 + 17
a - r = 31 → diferenta dintre baloanele albe si cele rosii
a + r =65
a - r = 31 ⇒ a = r + 31
r + 31 + r = 65
2 r = 65 - 31
2 r = 34
r = 34 : 2
r = 17 → baloane rosii
a = 17 + 31 = 48 → baloane albe
Verific: 17 + 48 + 17 = 82 → suma ( totalul) baloanelor
48 - 17 - 17 = 31 - 17 = 14 → diferenta
Raspuns: 17 baloane rosii, 48 baloane albe, 17 baloane verzi
