Răspuns:
Explicație pas cu pas:
3ab=3(10a+b)=30a+3b... se scrie in baza 10
deci 30a+3b=10d+b.→30a+2b=10d/:2→15a+b=5d
10a+b+10d+b=80
10a+ 10d+2b=80/:2
5a +5d+b=40
15a+b=5d→inlocuim in rel de mai sus....obtinem...5a+15a+b+b=40...20a+2b=40/:2.....10a+b=20.....ab=20....a=2, b=0
3*20=db....60=db...d=6
abbd=a006
