Question

Puteti sa ma ajutati cu problema aceasta?2 pixuri si 5 dvd =11 lei iar 5 pixuri si 2 dvd =17 lei .Cat costa fiecare pix si dvd.

Answer 1

2p+5dvd=11|•2
5p+2dvd=17|•5
4p+10dvd=22
25p+10dvd=85
21p=63|:21
p=3(lei)
4•3+10•dvd=22|-12
10dvd=10|:10
dvd=1(leu)