Given that the 6 numbers $a1, a2, a3, a4, a5, a6$ are integers from 0~9 and $a1 + a2 + a3 = a2 + a4 + a6$, we must present $\overline a6\overline a5\overline a4\overline a3\overline a2\overline a1$ as a 6 digit number, what are the values for A, B, C, D, E, F and G?
$\overline a6\overline a5\overline a4\overline a3\overline a2\overline a1$ = $11( [ABCD]a6 + [EFG]a5 + [HI]a4 + [J]a3 + a2)$
There is a overbar over $\overline a6\overline a5\overline a4\overline a3\overline a2\overline a1$ and i do not know what it means.
[ABCDEFGHIJ] are just any number from 0 to 9 or the minus sign (-), each letter correspond to 0 to 9 or minus (-).
From the answer sheet ABCD= 9091, EFG= 909, HI=91, J=9
I realized that i made some mistakes in the presentation so i edited the original question and will also post the original in japanese.
I do not know what tag i should add to this question, sorry if there is no connection between the question and the tags.