TV Screen & Bracket Moment Question

Hi all,

Can anyone help me with (what I think is) an equation relating to moment. I want to know what the point load will be on a wall with a TV screen and articulated bracket.

The screen weighs 25kg
The bracket weighs 20kg
The bracket puts the screen out at 700mm when fully extended

I hope this is all the info required!

Thanks in advance,
Nick