Answer:
10
Step-by-step explanation:
I asked siri
yes they are equal because they have the same sides and angle
The prime factors of 15 are: 1,3,5,15
The prime factors of 21 are: 1,3,7,21
The prime factors of 38 are: 1,3,13,39
The prime factor of 42 is : 1,2,3,6,7,14,21,42
x = 2
As we can see that the diagonals bisects so
LN = 20
UN = 20 /2 = 10
So Now
UN = 5x
10 = 5x
x = 10 / 5
