\(\overline{abc,de1}=0,3.\overline{1abc,de}\)
\(\overline{abc,de1}=\dfrac{3.\overline{1abc,de}}{10}\)
\(\overline{abcde1}=3.\overline{1abcd}\)
\(10.\overline{abcde}+1=300000+3.\overline{abcde}\)
\(7.\overline{abcde}=299999\)
\(\overline{abc,de1}=428,571\)
Vậy a = 4 ; b = 2; c= 8 ; d= 5; e=7