Please provide an answer to this question

Step-by-step explanation:
since it says angle F and angle E are equal, sides DF and DE are also equal by isosceles triangle property.
2x=3x-5
3x-2x=5
X=5
therefore;
DF= 2x = 2•5 =10
DE = 3x-5 = 3•5-5 = 15-5 = 10