Răspuns:
abc:cba=5 rest 46
b-c=2=>b=2+c
abc=5cba+46
100a+10a+c=5(100c+10b+a)+46
100a+10b+c=500c+50b+5a+46
100a-5a=500c-c+50b-10b+46
95a=499c+40b+46
95a=499c+40(c+2)+46
95a=499c+40c+80+46
95a=539c+126
c=1=>95a=539+126
95a=665=>a=665:95=>a=7, b=3
numărul cautat este: 731
