Question

y+999=9999999999

Answer 1

=9999999000kmiknha

Answer 2

y+999=9999999999

y=999999999-999

y=9999999000

Answer 3

y+999=9999999999

y+999=9999999999

y=999999999-999

y=9999999000

Vậy x=9999999000

Answer 4

y+999=9999999999

y=9999999999-999

y=9999999000

Answer 5

y + 999 = 9999999999

y = 9999999999 - 999

y = 9999999000

Vậy y = 9999999000