(A) In the given figure, ABC is a triangle in which DE|BC. If AD=x, DB=x−2,AE=x+2 and EC=x−1, then find the value of x.
BR

(B) Diagonals AC and BD of trapezium ABCD with AB|DC intersect each other at point O. Show that ‌

OA

OC

=‌

OB

OD

.