Răspunsuri

2014-04-02T09:36:10+03:00
A/5=B/3 =>A=5B/3,    (3A+B)/(2B-A)=(5B+B)/(2B-5B/3)=6B/(6B-5B)/3=18

2014-04-02T09:53:06+03:00
A/5=B/3=K
A=5K
B=3K
15K+3K/6K-5K
18K/1K=18   fiindca K se simplifica cu K