Question

im given figure if AB|| CD the find value of x?​

Answer 1

Answer:

where is the figure....??

Answer 2

Since, the lines are parallel

∠OCD=∠OAB∠ODC=∠OBA

and 

∠DOC=∠AOB (Vertically Opposite Angle)

Hence, △OCD∼△OBA

3x−1=5x−3⇒2x=2⇒x=1