Răspunsuri

2014-09-28T08:40:41+03:00
100a+10b+c+10a+b+a=319
am dezvoltat nr scrise in baza 10
111a+11b+c=319
a+b+c+d=25
a=2
b=8
c=9
verificare: 222+88+9=319
inlocuim in a+b+c+d=25
2+8+9+d=25
19+d=25
d=25-19
d=6