Triangle ABC is congruent to triangle KLM. m x=15 and t=2

x=20 and t=3

x=25 and t=4
x=30 and t=5

x=30 and t=5

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.