Question

?:9=1( ост6) ?:9=0(ост8)

Answer 1

1)1*9=9+6 =15 (неизвестное число)
проверка   15:9=1(ост.6)
2) 0*9=0+8=8 (неизвестное число)
проверка   8:9=0(ост.8)
Ответ: 15;  8

Answer 2

It seems like you've written a mathematical expression that isn't entirely clear. The notation you're using, which includes "?:9=1(ост6)" and "?:9=0(ост8)," is not a standard mathematical notation.

If you could provide more context or clarify what you're trying to convey, I'd be happy to help you better.