13.a: Triangle ADEF is *equilateral* with DE = 3x + 6, EF = 36 - 3x and FD =
12x-39. What is the value of x? *
O 3
5
6
O 12

Relax

Respuesta :

Answer:

5

Step-by-step explanation:

3x + 6 = 36 - 3x

6x = 30

x = 5