Respuesta :
That is very hard to understand as typed...it appears that this has something to do with finding an exact value for the repeating decimal 0.5555...
So if n=0.555... and then 10n=5.555... then
10n-n=5.555-.555
9n=5
n=5/9
So if n=0.555... and then 10n=5.555... then
10n-n=5.555-.555
9n=5
n=5/9