Can someone check my work for this question. At First i got 34 But the Teacher said it was wrong.. So please help.

By the way do we add Overlapping triangles sides? For example two triangles are overlapping one is 2 and the other 4. so the side with 4 would be added with 2 =6 When doing ratios right? Kind of hard to explain when writing this is more clear in the picture.

Uploaded with ImageShack.us