Răspunsuri

2014-01-20T17:53:20+02:00
2014-01-20T17:53:50+02:00
21=3ori7 sau21=1ori21. Rezulta numarul marit e 7 si atunci a=7-5=2 si b=3 :)

axb=6
ax5=21
(a+5)xb=21; axb+5xb=21;5xb=21-axb;5xb=21-6;5xb=15;b=15:5;b=3 deci ax3=6;a=6:3;a=2