Find the missing number in the matrix [closed]

Find the missing number, $$x$$, in the following matrix $$\begin{matrix} 16 & 13 & 9\\ 11 & 8 & 6\\ 9 & 7 & x \end{matrix}$$

• hi there, welcome to puzzling! however, unattributed puzzles may get closed. please provide the source as soon as possible. thanks! – Omega Krypton Jun 7 '19 at 11:13
• (Why are we assuming this is not OP's self-created content? We should assume content is original unless there's pretty good indications it isn't — such as actually finding it elsewhere, in which case posting a link to the other source would be appropriate. I don't see any of that here; did I miss something?) – Rubio Jun 10 '19 at 2:24
• Well, in this case a helpful user has pointed out in a flag that this same question appears on brainly.in where it seems to have been posted a few months ago. – Gareth McCaughan Jun 27 '19 at 22:34