Question

Please help? If you do I will give you cake ;O

Answer 1

I'm unsure of how to set it up...

Answer 2

so you promise to give cake :P ?

Answer 3

Promise lol

Answer 4

okay then now we have a deal D:
so first focus in the figures

Answer 5

Ok :)

Answer 6

we have to two triangles are similar thus:
\[\frac{ 2x }{ 13 }=\frac{ 3x-9 }{ 15 }\]