15^x:5^x=81

3^.5^x:5^x=81

3^x=81

3^4=81

The company has the permission to start selling in china.

1."You should visit the company's website." he said.

2."He hasn't come to the meeting." they said.

3."Do you want to become a doctor?" she asked me.

4."The support service will be set up in December" they said.

5."I has sent you the book last week." my mother said.

6."Is it too late to apply for the course?" he asked.

C