Question

Doi frati au impreuna 210 alune. Cate alune are fiecare baiat daca unul are 2/5 din cantitatea celuilalt ?

Answer 1

x+y = 210

x = 2/5 din y
x = 2y/5

x+y = 210
2y/5+y = 210
2y+5y = 1050
7y = 1050
y = 1050/7
y = 150 alune.

x+y = 210
x+150 = 210
x = 210-150
x = 60 alune.


Verificare: x+y = 60+150 = 210.



J'espère aidé :)