Răspunsuri

2014-06-10T12:17:05+03:00
B- banii lui Dinu
a - album

 b=a+120
b+11=2a => b=2a-11

a+120=2a-11
120+11=2a-a
131=a  (albumul costa 131)

b=131+120
b = 251 lei are dinu