Question

aflati trei numere consecutive a caror suma este egala cu 18

Answer 1

$x\\x+1\\x+2\\---\\3x+3=18\\3x=18-3\\3x=15\\x=15:3\\x=5 \\ \\ x\to5\\x+1\to6\\x+2\to7$

Answer 2

x= 1 nr
x+1 + 2 nr
X+2=3 nr.
x+x+1+x+2=18
3x+3=18/-3
3x=15/:3
x=5
x+1=5+1=6
x+2=5+2+7
Verificare:
5+6+7=11+7=18