in second image of post #6Ok.
We still don't have the full problem statement as the dimensions of the structure don't appear in any of your three images.
I'm guessing the calc is some geometry to find some unknown length. Maybe E is a typo. Hard to say really, that's why PF homework rules state that you must include the entire question
We need you to post the complete figure and data for the problem as given. There are no dimensions marked on what you have provided.i dont understand the 8/BD = x/EB
Can anyone explain about it? There's no point E in the diagram...
the full exact question is in photo 271....That's the complete question.....I see no dimensions (or angles) on either image in post #6. The second image appears to be part of the worked solution, how could you be expected to solve the problem if the geometry of the truss isn't given?