Question

Daca elevii unei clase ar fi asezati cate 2 elevi in banca, ar ramane 5 banci libere, iar un elev ar sta singur in banca. Daca elevii aceleasi clase ar
fi asezati cate 3 in banca, ar ramane 11 banci libere, iar intr-o banca ar sta numai 2 elevi. Cati elevi sunt in clasa ?

Answer 1

x=nr banci
2(x-6)+1=3(x-12)+2
2x-12+1=3x-36+2
2x-11=3x-34
x=34-11=23 banci
2(23-6)+1=35 elevi