Răspunsuri

2014-11-13T18:59:18+02:00
A-b=600
a=3b
3b-b=600
2b=600
b=600/2
b=300
a=3*300
a=900
4 4 4
2014-11-13T19:03:44+02:00
600:4=150     150*3=450      450+150=600