DE is the long narrow side, so judging from the picture, we can assume that DE is 6.
I'm not sure, but I believe your answer would be
8/10 = 4/20
Forgive me if I'm wrong, but the others seem to say the same thing that this answer doesn't.
Subtract the y then add the 4 to the other side so y=0
Answer:

Step-by-step explanation:
~Kandy~
Hope this helped!
Brainliest please!