Răspunsuri

2014-10-02T00:01:57+03:00
Abc= 100*a + 10*b + c
ab= 10*a + b
100a+10b+c-10a-b-c = 9ab
90a+9b=9ab
9(10a+b)=9ab
10a+b=ab, de unde si cctd

apropo nu uita ab=10a+b