Răspunsuri

2014-10-13T18:00:57+03:00
A-cravata
b-camasa
a=b/3
b=a+160   inlocuim in relatia I
a=(a+160)/3=a/3+160/3
a-a/3=160/3
(3a-a)/3=160/3           ·3
2a=160
a=160/2
a=80 lei
b=80+160=240 lei