Răspunsuri

2014-04-27T20:33:40+03:00
2014-04-27T20:34:43+03:00
A-b=800
b/2=a/4⇒a=4b/2
4b/2-b=800⇔4b-2b=800⇒2b=800⇒b=400
a-400=800⇒a=800+400=1200