Respuesta :

Answer:

x=3

Step-by-step explanation:

Since all the angles are equal, this is an equilateral triangle.  This means that all sides are equal

BC = AC

5x = 3x+6

Subtract 3x from each side

5x-3x =3x-3x+6

2x=6

Divide by 2

2x/2 =6/2

x=3