Akhtar, Ben and Carl each have some money. Akhtar has £65
Ben has £100
Carl has three £5 notes, one £20 note and some £10 notes.
The mean amount of money per person is £80
How many £10 notes does Carl have?,

1. statement- ca is parallel to db and e is the midpoint of ad reason- given2. statement- reason- alternate interior angles3. statement- de is congruent to ae reason- definition of midpoint4. statement- triangle aec is congruent to triangle deb reason- asa (angle side angle)