Răspunsuri

  • Utilizator Brainly
2014-02-28T18:17:26+02:00
A+b=32
a/3=b/5 ⇒ 5a=3b ⇒ a=3b/5
3b/5+b=32 ⇒ 8b=160, b=20, a=12
Paula are 12 castane, Ilinca are 20 castane.
2014-02-28T18:17:44+02:00
A-nr castan Paula
b-nr castane Ilinca
a+b=32
a=32-b
1 supra 3 ori a =1 supra5 ori b
32-b supra 3 = b supra 5
Amplifici ca sa ajungi laacelasi numitor la prima fractie cu 5 la a ddoua cu 3
160-5b=3b
160=8b
b=20 castane Ilinca
a + 20=32 
a=32-20=12 castane Paula
1 5 1