Răspunsuri

2014-06-04T14:46:08+03:00
X - cant initiala

x-x/8= A -  cat ramane in vad dupa ce scot 1/8
A-A/3=B
B=70

A-A/3=70
3A-A=210
2A=210
A=105

x-x/8=105
8x-x=840
7x=840
x=120