YOU SAID:

i 9 year old me brother is 7

INTO JAPANESE

私は 9 歳私の兄は 7

BACK INTO ENGLISH

I am 9 years old my brother's 7

INTO JAPANESE

私は9歳です。私の兄弟は7歳です。

BACK INTO ENGLISH

I am nine years old. My brother is seven years old.

INTO JAPANESE

私は 9 歳です。私の弟は 7 歳です。

BACK INTO ENGLISH

I am 9 years old. My brother is a 7-year-old.

INTO JAPANESE

私は 9 歳です。私の弟は 7 歳です。

BACK INTO ENGLISH

I am 9 years old. My brother is a 7-year-old.