Răspuns :
x= numarul de banci
Numarul de elevi este
2x+6=3(x-3)
2x+6=3x-9
x=15 banci
2·15+6=36 elevi
Numarul de elevi este
2x+6=3(x-3)
2x+6=3x-9
x=15 banci
2·15+6=36 elevi
x-n de banci
2x+6-nr de elevi
(x-3)*3
2x+6=3x-9
2x-3x=-9-6
-x=-15
x=15
2*15+6=30+6=36
2x+6-nr de elevi
(x-3)*3
2x+6=3x-9
2x-3x=-9-6
-x=-15
x=15
2*15+6=30+6=36