Răspuns :
x + x+1 + x +2 =30
3x + 3 = 30 | - 3
3x = 27 | :3
x = 9
x+1 = 10
x+2 = 11
Verificare
9+10 +11 = 30
3x + 3 = 30 | - 3
3x = 27 | :3
x = 9
x+1 = 10
x+2 = 11
Verificare
9+10 +11 = 30
a |-----|
b |-----|2| } 30.
30 - 2 = 28 ( 2 segmente egale)
28 : 2 = 14 (a)
14 +2 = 16 (b)
Proba : 14+16= 30.
b |-----|2| } 30.
30 - 2 = 28 ( 2 segmente egale)
28 : 2 = 14 (a)
14 +2 = 16 (b)
Proba : 14+16= 30.