Question

Pentru o demonstratie sportiva, copiii trebuie sa poarte stegulete colorate.Daca antrenorul ar da fiecarui copil cate doua stegulete, i ar ramane 6 stegulete, iar daca le ar da cate 3 stegulete ar ramane doi copii fara stegulete.Cati copii si cate stegulete erau?

Answer 1

x=numar stegulete
y=numar copii
x=2xy+6
x=3x(y-2)=3xy-3x2=x
x=2y+6
x=3y-6
\......\......\+6
\......\......\......\-6
6+6=12(copii)
12x2+6=
=24+6=
=30(stegulete)