Răspunsuri

2014-09-19T19:12:48+03:00

Fie a si b numerele.

a/b = 5/7 => a= 5b/7

3a - b/ 2= 46 => 3 * 5b/7 - b/2=46 => 15b/7-b/2=46 => 30b-7b=46 * 14 => 23b=644 => b=644/23 => b= 28

a= 5 * 28 / 7 => a = 5 *4=20.


2 3 2