Răspunsuri

  • Utilizator Brainly
2014-02-25T19:54:15+02:00
A/b=5/7 ⇒ 7a=5b ⇒ 7a-5b=0
(a+b)/2=29,4 ⇒ a+b=58,8/*5
Inmultim a doua ecuatie cu 5 si o adunam cu prima:
7a-5b+5a+5b=294 ⇒ 12a=294, a=24,5
b=58,8-24,5=34,3