Understanding Diode Current Flow

[alexmath]

Homework Statement

I don't quite understand how diode problems can be solved. Whereas having inverse direction of current flow (on paper) when working with resistors didn't matter, working with diodes does. In real life if current flows through diode from - to + on paper it doesn't. I really get confused with this change of direction of current... Thank you!

Homework Equations

The Attempt at a Solution

 

[SteamKing]

Is there a question here somewhere?