Răspunsuri

2014-05-27T18:44:21+03:00
X=nr. de bancnote de 10lei = nr. de bancnote de 5lei
a = suma Valentinei
b = suma Cameliei
a=10x
b=5x
a=b+150
10x=5x+150
10x-5x=150
5x=150
x=150/5=30
a=10x=10*30=300lei
b=5x=5*30=150lei