question_answer

If\[{{2}^{x}}={{8}^{y+1}}\]and\[{{9}^{y}}={{3}^{x-9}},\]then the values of\[x\]and y are:

A)  \[x=18\]and \[y=9\]

B)  \[x=21\]and \[y=6\]

C)  \[x=23\]arid \[y=4\]

D)  \[x=25\]and \[y=10\]